MCP server for analyzing and optimizing context window token usage — audit tool definitions, compres
MCP server for analyzing and optimizing context window token usage — audit tool definitions, compres
MCP server for analyzing and optimizing context window token usage. MCP tool definitions consume 40-72% of context windows before any user work begins — this server helps you measure, compress, and eliminate that waste.
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Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| session_id | Unique session identifier |
| action | "register_tool" | "log_call" | "report" |
| tool_name | Tool name (required for register_tool/log_call) |
| tool_tokens | Token cost (for register_tool, default 50) |
| audit_context_budget | Analyze the token cost of your MCP tool definitions. Estimates tokens per tool using chars/4 approximation on the full JSON definition. |
| optimize_tool_loading | Given a task description, recommend the minimal set of tools needed. Uses keyword matching and category relevance scoring. |
| compress_schema | |
| analyze_session_usage | Track which tools are actually called vs loaded during a session. |
| suggest_removals | Identify tools that can be safely removed based on usage patterns. |
| get_optimization_report | Full context window health check combining audit, removal suggestions, and compression recommendations. |
{
"mcpServers": {
"token-lens": {
"command": "npx",
"args": ["-y", "token-lens-mcp"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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