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

The description adds mode semantics and the rule that team_mode and multi_instance cannot both be true, which is not available from annotations. It does not contradict the annotations. Some side effects, like worker assignment moving, are only hinted in the schema param note rather than the description.

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?

Two sentences with no filler. The core action is front-loaded, and the mode explanation follows naturally in compact form.

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?

The main purpose, project placement, mode semantics, and the key constraint are present, and all parameter details are covered by the schema. It is silent on return behavior or what happens after creation, which is a minor gap given there is no output schema.

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% for all 6 parameters, so the baseline is 3. The description adds extra value by elaborating what team_mode and multi_instance mean and exposing the exclusivity constraint beyond the schema's one-line property descriptions.

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 states a specific verb (Create), resource (event/task list), and scope (within a project). It also names the two mode flags, which distinguishes it from project/worker/zone creation siblings even without naming them.

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?

It provides useful context for when multi_instance is valuable ('surveys, onboarding, info collection') and notes the mutual-exclusion constraint. However, it does not mention alternatives like tascan_update_event or tascan_create_project, nor give explicit when-not guidance.

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