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

Annotations already declare the tool read-only, idempotent, and non-destructive. The description adds the useful behavioral detail that 'evidence stays unreviewed and creates no mint right,' which tells the agent this preparation does not change review status or grant mint entitlement. This goes beyond what the annotations alone state.

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, front-loaded sentences with no filler or repetition of the schema. The first sentence states the core action and the second adds a key caveat. Every phrase earns its place while keeping the description compact.

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?

Given a simple two-parameter schema, a rich set of annotations, and an output schema, the description covers the main preparation behavior and policy caveats. It doesn't, however, explicitly place itself among the many prepare/submit siblings, so an agent might still struggle to choose the right step in a longer workflow. That slight ambiguity keeps it from a 5.

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 input schema thoroughly documents both parameters with patterns and descriptions, giving 100% schema description coverage. The description's phrase 'one activity hash' aligns with the evidenceHash parameter but adds no new detail about reservationId or how the two parameters interact. With complete schema coverage, baseline 3 is appropriate.

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 gives a clear verb and object: 'Prepare readable text binding one activity hash.' It also adds a meaningful boundary by noting the operation 'creates no mint right,' which helps separate it from claim/mint tools. However, it doesn't explain what the readable text is for or how it fits into the agent-entry flow, leaving some purpose ambiguity.

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?

There is no explicit guidance about when to use this tool versus siblings like submit_agent_entry_activity, prepare_agent_entry_claim, or prepare_agent_entry. The caveat about 'no mint right' implies a context, but it doesn't directly state prerequisites or routing conditions. An agent would have to infer usage from the tool name and sibling list.

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