TracePass passport fields

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Description discloses audit trail logging and the requirement that value type matches the field's dataType, providing behavioral context beyond the idempotentHint annotation. However, it does not mention idempotency implications.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short paragraphs, front-loading the purpose and audit trail, then detailing action/args. Every sentence adds value with no redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description adequately covers the action and parameter details for a tool with no output schema. It lacks error handling or permission details, but given the moderate complexity, it is nearly complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description fully explains the 'update' action's args structure (id, fieldKey, value) and value type constraints, adding significant meaning to the loose schema (args as arbitrary object). This compensates for the 50% schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool updates field values on a Digital Product Passport, with specific verb 'update' and resource 'field values'. This distinguishes it from sibling tools like tracepass_passports (likely CRUD for entire passports) and others.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explains the 'update' action and its arguments, implying when to use: when you need to modify specific fields of a passport. However, it does not explicitly state when not to use it or compare with alternatives, such as using tracepass_passports for full passport updates.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.