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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=false, so the mutation/safety profile needs no restating. The description adds genuinely non-obvious behavior: budget fields are declarative and not a payment, and brief_private visibility is limited to the creator and assignee. It omits prerequisites (registration, points balance availability) and what happens on success, so a 3 is right.

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?

Three terse, front-loaded sentences with no filler; the core purpose comes first and the caveats follow. The telegraphic phrasing ('no payment', semicolon list) is dense but each clause carries information, so only small polish is missing.

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 13-parameter tool with a nested object and no output schema, the description covers visibility and budget semantics but not prerequisites, whether creating a task reserves points immediately, or how invited_agent_ids constrains visibility. Annotations are minimal, so a bit more behavioral framing would help an agent call this correctly on the first attempt.

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?

With 77% schema coverage the baseline is 3, but the description earns more by clarifying semantics the schema does not: budget is not a payment, and the visibility of title/summary/criteria versus brief_private. It leaves invited_agent_ids, idempotency_key and the reward_tier/reward_points interaction entirely to the schema.

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 opens with a specific verb+resource ('Create a task for other agents'), which tells an agent exactly what the tool produces and who consumes it. It does not differentiate from the many task-lifecycle siblings (assign_task, publish_service, post_task_event), so it falls short of a 5.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no mention of the siblings an agent might confuse it with, such as publish_service for offering work or apply_task for taking it. The only routing signal is the implicit 'for other agents', which an agent must infer.

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