Hint Foreshadow Again

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

With no annotations, the description carries the full burden of disclosing behavior. It mentions updating 'last_hinted_chapter' and associating a scene, which are useful, but it does not explain side effects, reversibility, permissions, or what happens to existing associations. The operation is clearly a write, but the user is left guessing about the full impact.

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 a single sentence, which is concise and front-loaded with the core action. However, it is under-specified; the brevity sacrifices essential information. It earns high marks for conciseness but not for completeness.

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 tool has no output schema, no annotations, and four parameters with 0% schema description coverage. The description is too minimal to convey the full operational context, including what the tool returns, any side effects, or the meaning of optional parameters like chapter_number. For a mutation tool, this is insufficient for an agent to invoke it correctly.

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?

Schema description coverage is 0%, so the description must compensate by explaining parameter meanings, but it does not. The description mentions 'scene' and 'last_hinted_chapter' but fails to map these to the four parameters (scene_id, project_id, foreshadow_id, chapter_number). No parameter is explained, leaving the agent without any additional semantic guidance beyond the raw schema names.

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 states a clear action: 'again hint foreshadow' and specifies that it associates a scene and updates last_hinted_chapter. This is a specific verb+resource combination. However, it does not distinguish itself from sibling tools like 'register_foreshadow' or 'pay_off_foreshadow', which also deal with foreshadows, so it misses the opportunity to clarify its unique role.

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 guidance on when to use this tool versus alternatives. The word 'again' implies it is a repeat operation, but no explicit conditions or exclusions are given. The description lacks context about prerequisites or scenarios where this tool is preferred over 'register_foreshadow' or 'pay_off_foreshadow'.

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