vk_post_projects_3ca115fec881

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 transparency. It discloses authentication requirements and the raw proxy nature, but it contradicts the schema by calling the body 'optional' when it is actually required. This inconsistency undermines clarity about how to invoke the tool correctly.

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 concise but contains redundancy: 'Set an unsplash photo as project background' appears twice. It is structured logically but some sentences could be merged to reduce repetition without losing information.

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?

For a tool with no output schema and no annotations, the description should be more complete. It does not mention response format, side effects, or success/failure indicators. The contradiction regarding the required body leaves a critical gap in understanding how to correctly invoke the tool.

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 baseline is 3. The description adds useful alias information and path/query parameter handling, but it incorrectly states that the body is optional, which conflicts with the schema. This misdescription detracts from the semantic value and could mislead the agent.

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 function: 'Set an unsplash photo as project background.' It specifies the verb 'set', the resource 'project background', and the specific source 'unsplash'. The endpoint is explicitly named, distinguishing it from other project-related post tools among the siblings.

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 context for when to use the tool by specifying the exact REST endpoint and purpose. It does not explicitly mention alternatives or exclusions, but the focused endpoint description makes the usage context clear enough for distinguishing from other project update tools.

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