AI agents call get_session_pmids to retrieve information from Pubmed Search without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to retrieve a list of PubMed identifiers from a session context. This is a read-only operation with no side effects—it queries existing data without creating, modifying, deleting, or executing operations. Confidence is slightly reduced due to the empty description, but the semantic meaning of 'get_session_pmids' is clear enough to classify with reasonable confidence.
From the tool's definition Tool name 'get_session_pmids' indicates retrieval of PubMed IDs (pmids) associated with a session. The 'get_' prefix is a standard retrieval pattern.
Documented attack patterns abuse exactly the kind of access get_session_pmids gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pubmed Search, and nothing reaches the server without passing your rules. This is the rule we recommend for get_session_pmids:
{
"version": "1",
"default": "deny",
"tools": {
"get_session_pmids": {}
}
}get_session_pmids is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_session_pmids. It is categorised as a Read tool in the Pubmed Search MCP Server, which means it retrieves data without modifying state.
Register the Pubmed Search MCP server in PolicyLayer and add a rule for get_session_pmids: 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 Pubmed Search. Nothing to install.
get_session_pmids 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 get_session_pmids 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 get_session_pmids. 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.
get_session_pmids is provided by the Pubmed Search MCP server (u9401066/pubmed-search-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pubmed Search, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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63 Pubmed Search tools catalogued and risk-classified — across an index of 43,000+ MCP servers.