update_recipes_timeline_events_by_item_image

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

The description 'Update Event Image' implies a mutating operation, but it does not disclose any behavioral traits such as idempotency, whether it replaces or appends, allowed image formats, size limits, or required permissions. Since no annotations are present, the description carries the full burden, which it fails to meet.

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?

While the description is extremely concise at three words, it is under-specified and lacks essential details. Conciseness should not come at the cost of completeness; this is better characterized as under-information rather than efficient brevity.

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?

For a tool with four parameters and no annotations, a single sentence is entirely insufficient. The description omits any behavioral context, output format, or error conditions. Even though an output schema exists, its content is not summarized. The description is severely incomplete relative to the tool's 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 description does not mention any parameters, despite the input schema having four parameters (image, item_id, extension, accept-language). With schema coverage at 0%, the description adds no semantic value beyond the schema itself. It fails to explain what 'extension' means or how the 'image' binary should be provided.

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 'Update Event Image', which indicates the verb (update) and the resource (event image). It is specific and not a tautology, but it does not differentiate from siblings like 'update_recipes_timeline_events_by_item' which might update other fields. However, the name itself provides distinction, and the description is minimally adequate.

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 such as 'update_recipes_timeline_events_by_item' or 'create_recipes_timeline_events'. No context on prerequisites or preferred scenarios is provided.

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