Extract keywords by comparing two corpora
AI agents call get_keywords to retrieve information from Sketch Engine 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 Read operation: it queries and retrieves keyword extraction results from corpus linguistics data. There are no side effects, data modifications, deletions, code execution, or financial implications. The tool performs comparative analysis on existing corpora, consistent with other sibling tools like get_collocations, get_concordance, and get_word_sketch that all retrieve linguistic data.
From the tool's definition Tool extracts and compares keywords across two corpora via 'Extract keywords by comparing two corpora' — a query operation that retrieves linguistic analysis results without modifying, deleting, or executing external code.
Attacks that exploit this kind of access
Extract keywords by comparing two corpora. It is categorised as a Read tool in the Sketch Engine MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Sketch Engine MCP Server MCP server in PolicyLayer and add a rule for get_keywords: 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 Sketch Engine MCP Server. Nothing to install.
get_keywords 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_keywords 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_keywords. 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_keywords is provided by the Sketch Engine MCP Server MCP server (riccap/sketch-engine-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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