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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds the concrete returned field set and identifies the underlying Paymo endpoint (GET /api/tasks), which is useful behavioral context given there is no output schema. It does not mention the no-pagination/truncation behavior, which lives only in the schema.

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?

Front-loaded with purpose, then filters, then endpoint; no filler sentences. The parenthetical field enumeration is dense but earns its place since no output schema exists, though it makes the single sentence list-heavy.

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?

With no output schema, the description supplies the return-field list; annotations cover read-only safety; all 8 parameters are documented in the schema. Truncation/pagination caveats and the raw `where`/`include` semantics are only in the schema, but the description is otherwise sufficient to call the tool correctly.

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 the schema already documents all 8 parameters in more detail than the description (e.g. my_tasks semantics are spelled out in the schema). The description only restates the filter axes, adding no syntax or format detail beyond the structured field. 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 (List) and resource (tasks), enumerates the returned fields, and describes the filter dimensions. The 'my_tasks=true returns the caller's My Tasks' clause separates it from a plain filtered list and from the single-task paymo_get_task sibling.

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 clearly states the filter dimensions (project, task list, assignee, completion) and the special my_tasks mode, which tells the agent when this tool is the right choice. It never names an alternative tool or an explicit when-not-to-use condition, so it stops short of a 5.

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