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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds a genuine behavioral detail — results are limited to projects the caller may see — plus pagination bounds, but says nothing about ordering, total counts, or what a returned piece contains.

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 short sentences, front-loaded with the resource and scope, with no filler. Minor blemish: the typo 'Recurents' and the redundant restatement of the page-size rule already present in the schema.

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 simple read-only paginated list with full schema coverage and annotations, the description covers scope, content type, and pagination adequately. Only the absence of any hint about result ordering or volume keeps it from being fully complete.

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 all three parameters are already documented, including the 1-50 range and default of 10. The description merely restates the page-size constraint and adds no new meaning about account_code or page semantics; baseline 3 applies.

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 ('Paginated list of the doable pieces') and disambiguates the domain term 'pieces' by naming the concrete types (Tasks, Stories, Recurents). It does not, however, distinguish itself from the sibling SearchPiecesTool, which an agent could easily confuse with a plain listing.

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 only implied by the word 'list' and the scope note 'projects you may see in an account'. There is no explicit statement of when to prefer this over SearchPiecesTool or how it relates to ListProjectsTool, so the agent must infer the choice.

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