ファイルの文字数を計測します。絶対パスを指定してください（Windows形式 C:\\Users\\...、またはWSL/Linux形式 /c/Users/... のどちらも可）。スペースや改行を除いた実質的な文字数をカウントします。
AI agents call count_chars 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 file metadata (character count) without modifying, executing code, deleting, or creating data. It is a pure read operation that queries file content to produce a count. There are no side effects, no code execution, and no data modification. The severity is low because misuse would only result in unwanted information disclosure of file character counts, with minimal blast radius.
From the tool's definition Tool description states it 'counts characters in a file' (ファイルの文字数を計測します) and 'counts substantial character count excluding spaces and line breaks' (スペースや改行を除いた実質的な文字数をカウントします). It takes a file path as input and performs a read-only analysis operation.
Attacks that exploit this kind of access
ファイルの文字数を計測します。絶対パスを指定してください（Windows形式 C:\\Users\\...、またはWSL/Linux形式 /c/Users/... のどちらも可）。スペースや改行を除いた実質的な文字数をカウントします。. 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_chars: 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_chars 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_chars 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_chars. 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_chars 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.
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 →