Gemini Analyze Image Tool

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

readOnlyHint=true already declares the safety profile, so the bar is lower, but the description adds essentially nothing beyond the name and annotations: no note on model tradeoffs, latency, or how the query influences output. Output schema exists, so return format need not be restated, but no extra behavioral context is provided.

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?

A single front-loaded sentence with zero waste, but it is so terse that it verges on under-specification rather than true conciseness.

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?

With an output schema and full parameter coverage, the description only needs to supply usage context, and it omits that entirely. For a simple 3-param tool this is minimally adequate but leaves the agent guessing when to prefer it over the other analysis tools.

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 coverage is 100%, so model, query, and image_path are fully documented in the schema itself. The description adds no syntax, format, or default-behavior detail beyond what the structured fields already carry, making the baseline 3 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?

States a specific verb ('Analyze and describe') and resource ('local image file'). The word 'local' usefully separates it from the URL-based siblings, but it does not name or contrast with any specific alternative such as gemini_analyze_url_tool or gemini_analyze_document_tool.

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?

No when-to-use guidance, no prerequisites, and no mention of alternatives despite a large sibling set containing several overlapping analysis tools. The agent must infer that this is the one for local files rather than URLs.

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