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

The annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the write/idempotent/no-return nature is covered structurally. The description adds one genuinely useful fact beyond that: the required project_risks:write scope. It omits mutation semantics such as whether omitted fields are preserved or cleared, which matters for a 12-parameter update.

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 with no filler, and the action plus the ID requirement are front-loaded. It is efficient, though arguably too terse for a mutation tool with twelve parameters.

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?

Auth scope is covered and annotations carry the safety profile, but for a 12-param update with only id required the description should clarify partial-update behavior and confirm that the target risk must already exist. Those gaps keep it at minimum-viable rather than 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% with enums on impact, status, category and probability, so the schema fully documents the parameters. The description contributes nothing about field-level behavior (e.g. partial vs full replacement), which is the baseline-3 case when schema does the heavy lifting.

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 (Update) and resource (project risk) plus the identifying key (by ID), so an agent can distinguish it from create_project_risk and delete_project_risk. It does not differentiate itself from bulk_update or update_project, but the resource-level naming is unambiguous.

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?

There is no when-to-use guidance, no mention of the alternative bulk_update for multi-record edits, and no note that a risk ID must first be obtained from list_project_risks or get_project_risk. Usage is only implied by 'existing...by ID'.

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