vision_from_files_mixed

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

With no annotations provided, the description carries the burden of behavioral disclosure. 'One Gemini session' hints at session-resource management, but doesn't describe side effects like history consumption, limits on file count, session state, or resource cleanup. It doesn't mention the 'compact' behavior or when reconnection occurs. Adequate but minimal.

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, concise sentence that captures the core function. Zero waste, front-loaded with the primary purpose. Appropriate length for a tool whose parameters are fully documented in the schema.

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 100% schema coverage, a clear single-sentence purpose, and an output schema, the tool has baseline completeness. The presence of sibling 'mixed' variants (vision_from_files_mixed, from_resources_mixed, vision_from_resources_mixed) suggests a family of similar tools, but the description's differentiation is adequate for practical selection. Could add one detail on session implications but is largely sufficient.

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%, with all params described (paths, types, prompt, compact). The description adds marginal value beyond the schema—it frames the tool's purpose but doesn't deeply explain relationships between types and paths arrays beyond the schema's own 'must match length' note. The compact param is schema-documented but not explained in the description.

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 'Describe multiple files of mixed types in one Gemini session' clearly states the verb (describe), resource (multiple files of mixed types), and context (one Gemini session). It distinguishes from siblings like vision_from_file (single file) and vision_from_resource (resource vs file). However, it doesn't explicitly differentiate from vision_from_files, which appears to be a closely related sibling with similar multiple-file handling.

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 implies usage for mixed-type file batches but provides no explicit when-to-use versus alternatives. Siblings vision_from_files (multiple files) and vision_from_file (single file) suggest related tools, but no guidance is given on when to choose 'mixed' version over the straightforward 'files' version, nor how this relates to from_files_mixed or from_resources_mixed.

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