nasa_images

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions searching an archive but doesn't cover key aspects like whether this is a read-only operation, potential rate limits, authentication needs, or what the response format looks like (e.g., paginated results). This leaves significant gaps for a tool with 5 parameters and no output schema.

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, efficient sentence that front-loads the core purpose ('NASA Image and Video Library - search NASA's media archive'). There is no wasted text, making it highly concise and well-structured for quick understanding.

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 the tool's complexity (5 parameters, no annotations, no output schema), the description is incomplete. It lacks behavioral details, usage context, and output information, which are crucial for an agent to effectively use this search tool. The high schema coverage helps with parameters, but overall guidance is insufficient.

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 has 100% description coverage, so the schema already documents all 5 parameters (e.g., 'q' for search query, 'media_type' for filtering). The description adds no additional meaning beyond what's in the schema, such as examples or constraints, but since schema coverage is high, a baseline score of 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 clearly states the tool's purpose as searching NASA's media archive, which is a specific verb ('search') and resource ('NASA's media archive'). However, it doesn't explicitly differentiate from sibling tools like 'nasa_apod' (Astronomy Picture of the Day) or 'nasa_mars_rover' (Mars rover images), which might also involve NASA media but serve different functions.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention any context, exclusions, or comparisons to sibling tools, such as 'nasa_apod' for daily astronomy images or 'nasa_mars_rover' for Mars-specific media, leaving the agent to infer usage based on the name alone.

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