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

Annotations already declare readOnlyHint=true, so the safety profile is covered and the agent knows nothing is mutated. The description adds that results are paginated and gives the REST mapping, but it discloses nothing about authentication requirements, rate limits, or the shape/size of a page beyond what the schema's page/per_page fields already imply.

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 sentences, all front-loaded: identity and scope first, filters second, pagination and endpoint last. Every clause carries information and there is no filler or repetition of the title.

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 read-only, annotation-covered list tool with a fully documented schema this is nearly complete, but there is no output schema and the description never indicates what a task record contains or whether results are a flat array. The pagination note partially compensates, leaving a modest gap for an agent that must reason about the response.

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 page, per_page, is_active and updated_since are already fully documented with ranges and formats. The description restates the filter meaning (active status, updated-since) at a coarser level without adding syntax, defaults, or edge-case behavior, so baseline 3 is appropriate.

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 ('List tasks') and immediately disambiguates the domain term by defining tasks as the billable/non-billable work categories assignable to projects, which prevents confusion with time entries or project assignments in the sibling set. It also pins the operation to a concrete endpoint (GET /tasks).

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 implies when the optional filters apply ('optionally filtered by active status or updated-since'), which gives some usage framing, but it never states when to reach for this tool versus other harvest_list_* siblings or whether prerequisites exist. With no competing task-listing tool, the guidance gap is moderate rather than severe.

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