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

The annotations already declare read-only, idempotent, non-destructive, closed-world behavior, so the description adds useful context beyond them: the numbered-grid presentation, the uploads[n-1] indexing rule, the instruction not to draw uploads, and that the call is free. It still omits edge cases such as empty results or filtering behavior, but it is strong for a simple read-only picker.

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 terse and front-loaded: it identifies the card, states the WHEN condition, then gives the exact interaction rule and cost note. Every sentence contributes relevant information.

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 simple read-only picker with annotations and no output schema, the description covers purpose, usage, interaction, and cost. However, it does not explain the optional kind and limit parameters despite zero schema description coverage, so it is not fully 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?

Schema description coverage is 0%, so the schema names and enum values are the only parameter documentation. The description mentions 'recent uploads' but does not explain the kind filter or the limit parameter, leaving most parameter meaning to inference.

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 concrete resource and presentation: a numbered grid card of the user's recent uploads, used as a picker. It is clearly distinct from generation tools, but it does not explicitly contrast with the sibling list_uploads tool, so sibling differentiation is only partial.

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?

It gives an explicit WHEN condition: when the user picks from earlier uploads. It also explains the response behavior and numbering convention, but it does not state when to use list_uploads instead or any exclusions.

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