Find first node matching the specified pattern using tree-hugger-js intuitive syntax. Use for targeted searches when you need one specific match.\n\nExamples:\n• Find main function: find_pattern(
AI agents call find_pattern to retrieve information from Tree-Hugger-JS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs static code analysis by searching for and retrieving matching abstract syntax tree (AST) nodes. It has no side effects—it only locates and returns data without modifying, executing, or deleting any code. This is a classic Read operation with low severity because misuse would only expose information about code structure, not enable code execution or data destruction.
From the tool's definition Tool description states it 'Find[s] first node matching the specified pattern' and is used for 'targeted searches' to locate code nodes.
Attacks that exploit this kind of access
Find first node matching the specified pattern using tree-hugger-js intuitive syntax. Use for targeted searches when you need one specific match.\n\nExamples:\n• Find main function: find_pattern(. It is categorised as a Read tool in the Tree-Hugger-JS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tree-Hugger-JS MCP Server MCP server in PolicyLayer and add a rule for find_pattern: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Tree-Hugger-JS MCP Server. Nothing to install.
find_pattern is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_pattern rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for find_pattern. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
find_pattern is provided by the Tree-Hugger-JS MCP Server MCP server (qckfx/tree-hugger-js-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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