テキストの単語数を計測します。英語ではスペースで区切られた単語をカウントし、日本語では形態素解析を使用します。
AI agents call count_clipboard_words to retrieve information from Japanese Text Analyzer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes data (clipboard content) for counting purposes only. It performs read-only operations with no side effects, reversible changes, code execution, data deletion, or financial implications. The highest severity impact would be information disclosure if the clipboard contained sensitive data, but the tool itself is benign—it only counts and does not modify, execute, or delete anything.
From the tool's definition Tool description states it "counts words" in text from clipboard. The description explicitly indicates measurement/analysis operations: 'counts words in English by space-separated tokens' and 'uses morphological analysis for Japanese'.
Attacks that exploit this kind of access
テキストの単語数を計測します。英語ではスペースで区切られた単語をカウントし、日本語では形態素解析を使用します。. It is categorised as a Read tool in the Japanese Text Analyzer MCP Server, which means it retrieves data without modifying state.
Register the Japanese Text Analyzer MCP server in PolicyLayer and add a rule for count_clipboard_words: 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 Japanese Text Analyzer. Nothing to install.
count_clipboard_words 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 count_clipboard_words 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 count_clipboard_words. 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.
count_clipboard_words is provided by the Japanese Text Analyzer MCP server (mistizz/mcp-japanesetextanalyzer). 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.
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