Get the machine-readable trust passport for an AI artifact. Use this before an agent selects a tool, API, MCP server, model, repo, or framework for a task. Returns capability URIs, permissions, data access risk, known failure modes, observed outcomes, and trust score.
AI agents call trust_passport to retrieve information from Unfragile without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves metadata about AI artifacts (trust information, capabilities, permissions, risk assessments) to inform decision-making. It performs read-only lookups of trust passports without side effects. While the information returned could be used to make sensitive decisions, the tool itself only reads and returns existing trust data.
From the tool's definition Tool description states it 'Get[s] the machine-readable trust passport' and 'Returns capability URIs, permissions, data access risk, known failure modes, observed outcomes, and trust score.' The verb 'Get' and 'Returns' indicate data retrieval with no…
Attacks that exploit this kind of access
Get the machine-readable trust passport for an AI artifact. Use this before an agent selects a tool, API, MCP server, model, repo, or framework for a task. Returns capability URIs, permissions, data access risk, known failure modes, observed outcomes, and trust score. It is categorised as a Read tool in the Unfragile MCP Server, which means it retrieves data without modifying state.
Register the Unfragile MCP server in PolicyLayer and add a rule for trust_passport: 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 Unfragile. Nothing to install.
trust_passport 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 trust_passport 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 trust_passport. 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.
trust_passport is provided by the Unfragile MCP server (savirinc/unfragile-mcp-server). 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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