Pull a single spec by id from the active source. For markdown_local
AI agents call fetch_spec to retrieve information from Mk Spec Master without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool fetches (retrieves) a single specification document by identifier from a local markdown source. This is a read-only operation with no side effects, no code execution, no data modification, and no destructive capability. The narrow scope (single spec, retrieval only) and localized source further limit risk. Confidence is high because the description is clear and unambiguous about the retrieval-only nature.
From the tool's definition 'Pull a single spec by id from the active source' — retrieves specification data with no modification or deletion indicated.
Attacks that exploit this kind of access
Pull a single spec by id from the active source. For markdown_local. It is categorised as a Read tool in the Mk Spec Master MCP Server, which means it retrieves data without modifying state.
Register the Mk Spec Master MCP server in PolicyLayer and add a rule for fetch_spec: 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 Mk Spec Master. Nothing to install.
fetch_spec 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 fetch_spec 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 fetch_spec. 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.
fetch_spec is provided by the Mk Spec Master MCP server (kao273183/mk-spec-master). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
fetch_spec is one line of Mk Spec Master's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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