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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely new context by disclosing what is returned (the changes and the proposal's status) and enumerating the full status lifecycle including partial, declined, expired and superseded. It does not say what happens for an unknown or stale ID.

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 sentences, front-loaded with the read action and the two selection modes, then the return content. No filler and nothing redundant with the title or annotations.

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-optional-parameter, read-only tool with no output schema, the description covers selection behavior and return content adequately. The only gap is error/empty behavior when no proposal exists, which is minor at this complexity.

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 coverage is 100%, so baseline is 3, but the description adds real meaning: omitting proposal_id returns the latest proposal, which the schema only calls 'Optional'. That default-resolution behavior is not recoverable from the schema alone.

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?

The description gives a specific verb ('Read') and resource ('P.R.O. plan proposal'), plus the two selection modes (by ID, or latest when omitted). It implicitly distinguishes itself from get_training_plan and propose_plan_changes by scoping to 'proposal', but never names those siblings explicitly.

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 implied rather than stated: the 'by ID or latest' phrasing tells the agent how to call in two situations, and the schema notes the ID comes from propose_plan_changes. There is no explicit when-to-use or when-not-to-use guidance against the plan-related siblings (get_training_plan, propose_plan_changes).

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