Convert between different PMC article identifiers including PMC IDs, PubMed IDs (PMID), DOIs, and Manuscript IDs (MID). Supports up to 200 IDs per request.
AI agents call pmc_id_converter to retrieve information from Entrez MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure data retrieval and transformation tool. It takes identifiers as input and returns equivalent identifier mappings from NCBI's databases. No data is created, modified, deleted, or at risk of financial impact. The tool cannot execute code or trigger external operations beyond simple lookups.
From the tool's definition Tool converts between article identifiers (PMC IDs, PMIDs, DOIs, MIDs) without modifying, deleting, or executing operations. The description explicitly states 'Convert between' identifiers, which is a lookup/translation operation with no side effects.
Attacks that exploit this kind of access
Convert between different PMC article identifiers including PMC IDs, PubMed IDs (PMID), DOIs, and Manuscript IDs (MID). Supports up to 200 IDs per request. It is categorised as a Read tool in the Entrez MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Entrez MCP Server MCP server in PolicyLayer and add a rule for pmc_id_converter: 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 Entrez MCP Server. Nothing to install.
pmc_id_converter 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 pmc_id_converter 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 pmc_id_converter. 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.
pmc_id_converter is provided by the Entrez MCP Server MCP server (leongxj123/entrez-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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