AI agents call seq_api_catalog to retrieve information from Seq without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only search operation on Seq's API route catalog to discover available endpoints and their permissions. It retrieves metadata about routes (method, permission, text) without executing queries, modifying data, or triggering side effects. The purpose is informational—helping agents understand what API calls are available before making them.
From the tool's definition Tool name 'seq_api_catalog' and description 'Search the built-in official Seq route catalog by method, permission, or text' indicates a search/lookup operation against a catalog of available API routes with no modification or execution capability.
Attacks that exploit this kind of access
Search the built-in official Seq route catalog by method, permission, or text before making advanced API calls. It is categorised as a Read tool in the Seq MCP Server, which means it retrieves data without modifying state.
Register the Seq MCP server in PolicyLayer and add a rule for seq_api_catalog: 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 Seq. Nothing to install.
seq_api_catalog 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 seq_api_catalog 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 seq_api_catalog. 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.
seq_api_catalog is provided by the Seq MCP server (mclifeleader/seq-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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