Analyze Image

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It accurately states the tool describes or answers questions about images, but does not mention any limitations (e.g., file size, format support, accuracy, or response format). While not misleading, it lacks detail beyond the core function.

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 extremely concise, using only two short sentences with no redundant information. Every word adds value, and the key information (purpose and usage context) is front-loaded.

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 simplicity (2 parameters, no output schema, no nested objects), the description is adequate. It covers the general use case and provides usage context. However, it could mention potential failure modes (e.g., unclear images) or the fact that it handles both description and question answering.

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 100%, so the schema already documents both parameters. The description adds minimal extra meaning: it clarifies that 'question' is optional and that the tool provides a general description if omitted. This is helpful but not substantial beyond the schema.

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 ('Describe an image or answer a specific question about it') and explicitly distinguishes it from specialized siblings by labeling it as a 'General-purpose vision tool for when no more specific tool applies.' This provides specific verb+resource and differentiation.

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 says 'for when no more specific tool applies,' which gives clear guidance on when to use this tool versus the specialized alternatives listed in sibling tools. However, it does not explicitly state when not to use it or list conditions that would make a more specific tool preferable.

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