analyze_image

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 input types and custom prompts but does not disclose whether the operation is read-only, any side effects, output format, or security implications of accessing local file paths. This is a significant gap for a tool with no annotation support.

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 two short sentences, front-loaded with the primary action ('分析图片内容'), and contains no redundant or filler words. Every phrase adds useful information about input handling and customization.

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?

The tool is simple with two parameters and no output schema, but the description still omits any mention of what the tool returns or the format of the analysis result. For a tool with no output schema, the description should compensate by explaining return behavior, which it does not fully do. However, the input handling is well covered, so the description is minimally adequate.

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 provides 100% parameter coverage with detailed descriptions for both 'image' and 'prompt'. The description adds minimal semantic value beyond what the schema already states, merely reiterating the prompt capability. Thus the baseline of 3 is appropriate because the schema does the heavy lifting.

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 '分析图片内容' (analyze image content), a specific verb and resource, and lists supported input types (URL or local path) and optional custom instructions. Since there are no sibling tools, it fully distinguishes the tool's purpose.

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 clear usage context by explaining that images can be passed via URL or local file path and that an optional custom prompt can be supplied. As there are no sibling tools or alternatives, explicit when/when-not guidance is not needed, but the context is sufficiently clear.

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