AI agents call memstem_get_skill to retrieve information from Memstem without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns skill data without side effects. It follows the Read category pattern of retrieving or fetching information from a knowledge store. The exact-match lookup mechanism and read-only nature present minimal security risk; misuse would only expose existing skill metadata, not cause harm, data loss, or unauthorized execution.
From the tool's definition Tool name contains 'get' and description states 'Retrieve a skill by exact title match' — pure retrieval with no modification, deletion, or execution of code.
Attacks that exploit this kind of access
Retrieve a skill by exact title match. It is categorised as a Read tool in the Memstem MCP Server, which means it retrieves data without modifying state.
Register the Memstem MCP server in PolicyLayer and add a rule for memstem_get_skill: 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 Memstem. Nothing to install.
memstem_get_skill 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 memstem_get_skill 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 memstem_get_skill. 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.
memstem_get_skill is provided by the Memstem MCP server (memstem/memstem). 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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