extract
AI agents call extract to retrieve information from PostCrawl MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears designed to extract or retrieve content from social media (Reddit), which is a read-only operation with no side effects. The empty description lowers confidence slightly, but the context of sibling tools and server purpose strongly suggests content extraction/retrieval rather than modification or deletion.
From the tool's definition Tool name 'extract' combined with sibling tools 'search' and 'search_and_extract' on a server described as providing 'access to search and extract content from social media platforms' indicates data retrieval functionality.
Attacks that exploit this kind of access
extract. It is categorised as a Read tool in the PostCrawl MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PostCrawl MCP Server MCP server in PolicyLayer and add a rule for extract: 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 PostCrawl MCP Server. Nothing to install.
extract 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 extract 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 extract. 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.
extract is provided by the PostCrawl MCP Server MCP server (post-crawl/mcp). 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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