char_frequency
Analyze character frequency and breakdown of a text.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/char-frequency.md
What char_frequency does on UnClick
AI agents call char_frequency to retrieve information from UnClick without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
text | string | Yes | Text to analyze. |
case_sensitive | boolean | — | Distinguish upper/lower case (default false). |
Parameters from the server's own tool schema.
Why char_frequency is rated Low
This tool performs textual analysis to compute frequency distributions of characters within input text. It is a pure read operation that extracts information and produces analysis results without side effects, data modification, code execution, or external system interaction. The low severity reflects minimal risk even if misused—an AI agent cannot cause harm by repeatedly analyzing text frequencies.
From the tool's definition Tool name 'char_frequency' and description 'Analyze character frequency and breakdown of a text' indicate a data analysis operation that retrieves statistical information from provided text without modifying or executing external operations.
Attacks that exploit this kind of access
The rule that runs char_frequency safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For char_frequency, this is the rule to start with:
char_frequency is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every char_frequency call is checked against it from then on.
Questions about char_frequency
Analyze character frequency and breakdown of a text. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
char_frequency accepts 2 parameters: text, case_sensitive. Required: text. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for char_frequency: 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 UnClick. Nothing to install.
char_frequency 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 char_frequency 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 char_frequency. 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.
char_frequency is provided by the UnClick MCP server (@unclick/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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