Extracts key-value pairs from arbitrary noisy text and returns them as type-safe TOML (str).
AI agents call extract_toml to retrieve information from Flexible Key-Value Extracting MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only transformation: it parses input text and formats it as TOML output. No data is modified, deleted, or executed. The operation is reversible and read-like in nature (analyze and return formatted data). Even though it processes text with LLMs, it does not execute arbitrary code or commands—it only extracts and formats key-value pairs.
From the tool's definition Tool 'extract_toml' extracts key-value pairs from text and returns structured TOML output. The description contains no verbs indicating state changes: no create, update, delete, write, execute, or financial operations.
Attacks that exploit this kind of access
Extracts key-value pairs from arbitrary noisy text and returns them as type-safe TOML (str). It is categorised as a Read tool in the Flexible Key-Value Extracting MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Flexible Key-Value Extracting MCP Server MCP server in PolicyLayer and add a rule for extract_toml: 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 Flexible Key-Value Extracting MCP Server. Nothing to install.
extract_toml 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 extract_toml 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 extract_toml. 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.
extract_toml is provided by the Flexible Key-Value Extracting MCP Server MCP server (kunihiros/kv-extractor-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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