text_similarity
Calculate similarity between two texts (Jaccard similarity).
This record as markdown: /tools/io-tinyfn-tinyfn/text-similarity.md
What text_similarity does on TinyFn
AI agents call text_similarity to retrieve information from TinyFn 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 |
|---|---|---|---|
text1 | string | Yes | First text |
text2 | string | Yes | Second text |
Parameters from the server's own tool schema.
Why text_similarity is rated Low
This tool performs a deterministic mathematical calculation (Jaccard similarity coefficient) between two input texts. It produces no side effects, does not modify any data, execute external commands, delete information, or commit financial transactions. It is a simple analytical function that classifies as a Read operation—specifically, a computation over provided data with no persistence or external effects.
From the tool's definition Tool name 'text_similarity' and description 'Calculate similarity between two texts (Jaccard similarity)' indicate a pure computation that retrieves/compares data without modification, deletion, or external state changes.
Attacks that exploit this kind of access
The rule that runs text_similarity safely
PolicyLayer is an MCP gateway: it sits between your AI agents and TinyFn, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For text_similarity, this is the rule to start with:
text_similarity 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 TinyFn, apply this rule, and every text_similarity call is checked against it from then on.
Questions about text_similarity
Calculate similarity between two texts (Jaccard similarity). It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
text_similarity accepts 2 parameters: text1, text2. Required: text1, text2. The full parameter table on this page comes from the server's own tool schema.
Register the TinyFn MCP server in PolicyLayer and add a rule for text_similarity: 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 TinyFn. Nothing to install.
text_similarity 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 text_similarity 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 text_similarity. 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.
text_similarity is provided by the TinyFn MCP server (https://api.tinyfn.io/mcp/all/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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