AI agents call scan to retrieve information from THOUGHT without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to scan a code repository to ingest or analyze its contents. 'Scanning' and 'walking' a repository path are read-only operations that traverse and examine files without modifying them. No evidence of state changes, code execution, or destructive operations.
From the tool's definition Tool description states 'Incremental code-scan primitive. Walks repo_path, ingests' — the verb 'walks' and 'ingests' indicate traversal and reading of repository contents without modification.
Attacks that exploit this kind of access
Incremental code-scan primitive. Walks repo_path, ingests. It is categorised as a Read tool in the THOUGHT MCP Server, which means it retrieves data without modifying state.
Register the THOUGHT MCP server in PolicyLayer and add a rule for scan: 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 THOUGHT. Nothing to install.
scan 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 scan 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 scan. 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.
scan is provided by the THOUGHT MCP server (rnbbarrett/thought-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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