AI agents call search_standard_samples to retrieve information from GBMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read operation that retrieves or queries data about standard samples. As a search/query tool, it has no side effects, cannot modify or delete data, and cannot execute arbitrary operations. The deprecated status does not change its fundamental safety profile. Classification as Read with low severity is appropriate given the limited blast radius of misuse (information disclosure only).
From the tool's definition Tool name 'search_standard_samples' and description indicate it searches/queries standard samples metadata. The 'search' verb and 'Deprecated alias' framing suggest read-only retrieval with no side effects.
Attacks that exploit this kind of access
Deprecated alias for samr_search_standard_samples. It is categorised as a Read tool in the GBMCP MCP Server, which means it retrieves data without modifying state.
Register the GB MCP server in PolicyLayer and add a rule for search_standard_samples: 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 GBMCP. Nothing to install.
search_standard_samples 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 search_standard_samples 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 search_standard_samples. 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.
search_standard_samples is provided by the GB MCP server (loydgik/gbmcp). 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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