查找论文的合法开放获取版本（需配置Unpaywall）
AI agents call get_open_access_link to retrieve information from Academic Paper MCP HTTP/SSE Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only lookup operation to locate legitimate open-access versions of academic papers. It retrieves metadata/URLs but does not create, modify, delete, or execute any operations. The use of Unpaywall (a legal OA aggregation service) further confirms this is a data retrieval function. No side effects or destructive/financial/execution risks apply.
From the tool's definition Tool name 'get_open_access_link' and description indicating it 'finds legal open access versions of papers' (with Unpaywall configuration) — retrieves/queries access information without modifying, deleting, or executing operations.
Attacks that exploit this kind of access
查找论文的合法开放获取版本（需配置Unpaywall）. It is categorised as a Read tool in the Academic Paper MCP HTTP/SSE Server MCP Server, which means it retrieves data without modifying state.
Register the Academic Paper MCP HTTP/SSE Server MCP server in PolicyLayer and add a rule for get_open_access_link: 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 Academic Paper MCP HTTP/SSE Server. Nothing to install.
get_open_access_link 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_open_access_link 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_open_access_link. 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_open_access_link is provided by the Academic Paper MCP HTTP/SSE Server MCP server (pastchais/academic-paper-mcp-http). 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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