damerau_distance
Calculate Damerau-Levenshtein distance (edits + transpositions) between two strings.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/damerau-distance.md
What damerau_distance does on UnClick
AI agents call damerau_distance 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_a | string | Yes | First string. |
text_b | string | Yes | Second string. |
Parameters from the server's own tool schema.
Why damerau_distance is rated Low
The Damerau-Levenshtein distance is a string metric algorithm that computes edit distance. It takes two input strings and returns a calculated distance value. No data is retrieved from external sources, created, modified, deleted, or executed. This is a deterministic, side-effect-free computation fitting the Read category (information derived from inputs with no state changes).
From the tool's definition Tool description states it 'Calculate[s] Damerau-Levenshtein distance...between two strings.' This is a pure computational function that compares strings and returns a numeric metric with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
The rule that runs damerau_distance 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 damerau_distance, this is the rule to start with:
damerau_distance 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 damerau_distance call is checked against it from then on.
Questions about damerau_distance
Calculate Damerau-Levenshtein distance (edits + transpositions) between two strings. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
damerau_distance accepts 2 parameters: text_a, text_b. Required: text_a, text_b. 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 damerau_distance: 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.
damerau_distance 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 damerau_distance 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 damerau_distance. 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.
damerau_distance 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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