AI agents call get_fulltext 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.
This tool retrieves and returns article content from a public academic database (Europe PMC). It has no side effects—it does not create, modify, delete, or execute operations. The action is purely informational/read-only, consistent with the 'Read' category for data retrieval tasks. Low severity because misuse would only expose existing public research content, with minimal blast radius.
From the tool's definition Tool name 'get_fulltext' and description 'Get full text of an article from Europe PMC' indicate retrieval of existing article content with no modification, deletion, or execution of code.
Documented attack patterns abuse exactly the kind of access get_fulltext 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_fulltext:
{
"version": "1",
"default": "deny",
"tools": {
"get_fulltext": {}
}
}get_fulltext is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get full text of an article from Europe PMC. 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_fulltext: 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_fulltext 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_fulltext 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_fulltext. 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_fulltext 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.