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

The description adds no behavioral information beyond what annotations already indicate (readOnlyHint=false, destructiveHint=false). It does not disclose side effects, idempotency behavior, or the asynchronous nature of creating a job. Since it adds zero context, the score is low.

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?

One line is extremely short, but the brevity is under-specification rather than conciseness. The description fails to include any explanatory content and would be better replaced with a minimal sentence describing the tool's function.

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?

This is a complex tool with nested posts array, required idempotency_key, and no output schema. The description is entirely inadequate, providing no context about the request body, side effects, or result handling. It is almost as minimal as a single-word description.

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 50%, and the description provides no additional explanation for parameters. The body/posts structure and the relationship between brand_id, workspace_id, and idempotency_key are left unexplained, so the description does not compensate for the schema's gaps.

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 is only 'POST /calendar/bulk-fill', which gives the HTTP method and path but does not explain what a 'bulk-fill' job does. It does not distinguish this from siblings like aidelly_bulk_create_posts or aidelly_create_scheduled_post. The verb+resource is present but the actual action is unclear.

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 guidance is provided on when to use this tool versus alternatives. The description lacks any context about use cases, prerequisites, or exclusions, leaving the agent without direction for appropriate selection.

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