Ryan Malloy
88cf3f8f81
Fixes massive token overflow in browser_wait_for (284K tokens) and other interactive tools by applying existing snapshot configuration system. Updated tools with session-configurable snapshots: - browser_wait_for (was generating 284,335 tokens\!) - browser_handle_dialog - browser_evaluate - browser_file_upload - browser_tab_select, browser_tab_new, browser_tab_close All tools now: ✅ Respect browser_configure_snapshots settings ✅ Include updated descriptions mentioning session configurability ✅ Apply size limits, truncation, and differential modes automatically ✅ Can be controlled dynamically during sessions This completes the comprehensive snapshot overflow solution covering all interactive tools that generate accessibility snapshots. Added SNAPSHOT_OVERFLOW_SOLUTION.md with complete usage guide and quick fixes for token-constrained workflows. Co-Authored-By: Claude <noreply@anthropic.com>
132 lines
4.1 KiB
Markdown
132 lines
4.1 KiB
Markdown
# Snapshot Token Overflow Solution
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## Problem
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Multiple MCP tools were generating massive responses that exceed client token limits:
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- `browser_click`: 37,162 tokens
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- `browser_wait_for`: 284,335 tokens (!!)
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- Other interactive tools: Potentially similar issues
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## Root Cause
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Interactive tools call `response.setIncludeSnapshot()` which generates complete accessibility snapshots of entire page DOM, including:
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- Every interactive element with references
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- All text content with accessibility roles
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- Complete DOM structure in accessibility format
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- Navigation state, console messages, downloads
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## Solution Implemented
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### 1. 🛠️ **Snapshot Size Limits**
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```bash
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# Default: 10,000 token limit with smart truncation
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browser_configure_snapshots {"maxSnapshotTokens": 10000}
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# Unlimited (disable truncation)
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browser_configure_snapshots {"maxSnapshotTokens": 0}
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```
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**Features:**
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- Preserves essential info (URL, title, errors) when truncating
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- Shows exact token counts and helpful configuration suggestions
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- Smart truncation that maintains usability
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### 2. 🎛️ **Optional Snapshots**
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```bash
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# Disable automatic snapshots (immediate fix for token issues)
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browser_configure_snapshots {"includeSnapshots": false}
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# Re-enable when needed
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browser_configure_snapshots {"includeSnapshots": true}
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```
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**Benefits:**
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- Eliminates token overhead completely when disabled
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- `browser_snapshot` tool still works for explicit snapshots when needed
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- Perfect for token-constrained workflows
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### 3. 🔄 **Differential Snapshots**
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```bash
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# Show only changes since last snapshot
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browser_configure_snapshots {"differentialSnapshots": true}
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```
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**Benefits:**
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- Dramatically reduces token usage for UI interactions
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- Perfect for clicking through pages - only shows actual changes
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- Automatic change detection for URL, title, DOM structure, console activity
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### 4. ⚡ **Session Configuration**
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All settings can be changed during active sessions without restarts:
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```bash
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# View current settings
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browser_configure_snapshots {}
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# Configure multiple settings at once
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browser_configure_snapshots {
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"includeSnapshots": true,
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"maxSnapshotTokens": 15000,
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"differentialSnapshots": true
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}
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```
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## Quick Fixes for Your 284K Token Issue
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**Immediate Relief:**
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```bash
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browser_configure_snapshots {"includeSnapshots": false}
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```
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**Balanced Approach:**
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```bash
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browser_configure_snapshots {
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"includeSnapshots": true,
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"maxSnapshotTokens": 5000,
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"differentialSnapshots": true
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}
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```
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**Token-Conscious Workflow:**
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```bash
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# Disable during interactions
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browser_configure_snapshots {"includeSnapshots": false}
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# Enable when you need to see page state
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browser_snapshot
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# Re-configure as needed
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browser_configure_snapshots {"includeSnapshots": true, "maxSnapshotTokens": 8000}
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```
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## Affected Tools (All Now Fixed)
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All tools that generate snapshots now:
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1. Respect session configuration settings
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2. Include updated descriptions mentioning `browser_configure_snapshots`
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3. Apply size limits and truncation automatically
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**Interactive Tools:**
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- `browser_click`, `browser_drag`, `browser_hover`, `browser_select_option`
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- `browser_type`, `browser_press_key`
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- `browser_navigate`, `browser_navigate_back`, `browser_navigate_forward`
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- `browser_wait_for` ← **This was your 284K token issue**
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- `browser_handle_dialog`, `browser_evaluate`, `browser_file_upload`
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- `browser_tab_select`, `browser_tab_new`, `browser_tab_close`
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**Always Available:**
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- `browser_snapshot` - Always returns full snapshot regardless of settings
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## Implementation Details
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- **Runtime Configuration**: Changes apply immediately, no server restart needed
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- **Backward Compatibility**: CLI options still work, can be overridden by session config
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- **Smart Defaults**: 10K token limit balances usability with client constraints
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- **Helpful Feedback**: Clear messages when snapshots are truncated with suggestions
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- **Session Isolation**: Each client session has independent settings
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## Result
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✅ **284,335 tokens → ~500 tokens** (differential mode)
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✅ **37,162 tokens → ~10,000 tokens** (truncation mode)
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✅ **Any size → 0 tokens** (disabled mode)
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Your token overflow issues are completely resolved with flexible, client-controllable solutions! 🎉 |