Deterministic unit-of-measure conversion: mass (g/kg/lb/oz/t…), length (m/km/in/ft/mi…), volume (l/ml/gal/qt/cup…), area (m2/ft2/acre/ha), temperature (C/F/K). Case-insensitive with aliases (kg/kilogram). Returns the exact result + dimension. Cross-dimension (kg→m) is rejected. Ground-truth facto...
AI agents call convert.unit to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data (unit conversion lookup and calculation) with no side effects. It does not create, modify, delete, or execute external operations. Despite being on a pay-per-call server (2s.io), the tool itself performs only a deterministic read operation. The financial aspect is a platform-level concern, not an intrinsic property of this tool's functionality.
From the tool's definition Tool performs 'Deterministic unit-of-measure conversion' with 'exact result + dimension' returned. No modification, deletion, execution, or financial transaction occurs.
Attacks that exploit this kind of access
Deterministic unit-of-measure conversion: mass (g/kg/lb/oz/t…), length (m/km/in/ft/mi…), volume (l/ml/gal/qt/cup…), area (m2/ft2/acre/ha), temperature (C/F/K). Case-insensitive with aliases (kg/kilogram). Returns the exact result + dimension. Cross-dimension (kg→m) is rejected. Ground-truth factors instead of an LLM approximation. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for convert.unit: 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 Mcp. Nothing to install.
convert.unit 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 convert.unit 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 convert.unit. 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.
convert.unit is provided by the MCP server (@2sio/mcp). 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.
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