Last score processing time

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds semantic context by clarifying that the timestamp represents when the score summary was generated, which is not obvious from the name or title alone. No contradiction with annotations.

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 sentences with no fluff. The first sentence states the action and resource, the second explains its practical purpose. Every word earns its place.

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?

This is a simple metadata tool with no parameters, no output schema, and annotations that cover safety. The description fully explains what it returns and why it is useful, making it complete for its complexity.

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 tool has zero parameters, and the schema fully reflects this with an empty properties object. With 0 params, the baseline is 4; the description correctly avoids adding any parameter-specific details.

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 uses a specific verb 'Retrieves' and a precise resource: 'the most recent time the DEX experience score summary was generated.' This clearly distinguishes it from sibling tools like dex_next_score_update_time (future time) and dex_latest_experience_scores (the scores themselves).

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 explicitly states its use case: 'Useful for judging how fresh the scores returned by the other dex_* tools are.' This provides clear contextual guidance and implies these other tools are alternatives. It does not name specific alternatives, but the family reference is sufficient for the agent.

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