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

The description frames this unambiguously as a read ('Read a project's current product vision'), while the annotations declare readOnlyHint=false and idempotentHint=false, i.e. a potentially state-mutating, non-repeatable operation. That is a direct contradiction between stated behavior and the structured safety profile, which is exactly the case the rubric scores 1 for, regardless of how much other useful context the text supplies.

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 short, front-loaded paragraphs: purpose first, then the read-before-write rationale, then return shape and scoping. Every sentence carries non-redundant information and nothing is padded.

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 single-parameter getter with an output schema, the description still adds the return shape ({project_id, product_vision_md, updated_at}), the None-when-unset case, and the tenant-scoping failure mode. Nothing an agent needs to call this correctly is missing.

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 0% for the single `project_id` parameter, so the description must carry the meaning. It partially does: 'Tenant-scoped: a project not in the caller's workspace 404s' tells the agent the id must belong to the caller's workspace and what happens on mismatch, but it says nothing about id format or where to obtain it (e.g. `list_projects`).

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 (read) and resource (a project's current product vision), and glosses the resource in plain terms ('what the product is for'). It also names the paired sibling `set_product_vision`, so an agent can distinguish the getter from the setter without opening either schema.

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?

Explicitly routes usage: the paired setter replaces the whole document, so a write without a prior read silently discards existing content, and editing means read-modify-write. That is a concrete when-to-use and when-not-to-write-blindly instruction, not just implied context.

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