Performs deep research using the Perplexity API. Accepts an array of messages (each with a role and content) and returns a comprehensive research response with citations.
AI agents call perplexity_research to retrieve information from MCP Perplexity Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries information from Perplexity.ai's research capabilities. It has no side effects on data—it only reads/searches and returns results with citations. This is a classic Read operation. Severity is low because misuse would merely return irrelevant or false research information, not cause damage, data loss, or execution of unintended operations.
From the tool's definition Tool description states it 'performs deep research' and 'returns a comprehensive research response with citations.' The input is 'an array of messages' and the output is research information with sources.
Attacks that exploit this kind of access
Performs deep research using the Perplexity API. Accepts an array of messages (each with a role and content) and returns a comprehensive research response with citations. It is categorised as a Read tool in the MCP Perplexity Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Perplexity Server MCP server in PolicyLayer and add a rule for perplexity_research: 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 MCP Perplexity Server. Nothing to install.
perplexity_research 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 perplexity_research 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 perplexity_research. 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.
perplexity_research is provided by the MCP Perplexity Server MCP server (samwang0723/mcp-perplexity). 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.
Teams ship this data inside their own products. See what a licence covers →