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

Annotations supply destructiveHint=true, so the safety bar is partly covered. The description adds genuinely useful behavior — patch semantics where unspecified fields are left untouched — but says nothing about what a destructive update can clobber, permission/auth requirements, or validation failures.

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 compact fragments, front-loaded with the WRITE marker and the key patch-semantics rule. The trailing REST endpoint restatement is mildly redundant but cheap and aids traceability.

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 10-parameter mutation tool with no output schema and only a destructiveHint annotation, the description is adequate but thin: it omits return/confirmation behavior, permission requirements, and side effects of re-parenting or archiving.

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% (10/10 params documented, including priority enum mapping and Unix-ms date formats), so the schema carries parameter meaning. The description adds no parameter-level detail beyond the schema, making the baseline 3 correct here.

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?

States a specific verb and resource plus scope ("update fields on an existing task"), which implicitly separates it from clickup_create_task and clickup_get_task. It stops short of naming an alternative sibling explicitly, so it is clear but not fully differentiated.

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?

Usage is implied by the mutation framing and the note that only passed fields change, so an agent can infer this is the incremental-edit path. There is no explicit when-to-use statement, no prerequisite (e.g. that the task must already exist and be accessible), and no named alternative.

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