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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so safety is covered. The description adds that each entry carries a one-line summary and that listings fall into two kinds, which is useful context, but it says nothing about ordering, count, or response shape for a tool with no output 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?

A single front-loaded sentence with no filler. The trailing clause 'requirements you can send' is vague enough to cost a point but the structure itself is efficient.

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 zero-parameter, non-destructive listing tool this is close to sufficient, but with no output schema the agent must rely on the description to know what comes back beyond 'one-line summary'. The unexplained terminology ('services' vs 'requirements' vs the name's 'propositions') leaves the agent guessing at the catalogue's contents.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The description does not misrepresent any input.

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 verb and resource are stated ('List Decant's services with a one-line summary'), but the tool name uses jargon ('propositions') that the description renames as 'services', creating a mismatch an agent must resolve. The two categories given ('lookups that run instantly' and 'requirements you can send') are evocative but not precise, and do not cleanly separate this tool from describe_proposition.

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?

No explicit when-to-use guidance and no sibling is named as an alternative. The phrase 'requirements you can send' loosely gestures at submit_request without saying so, which risks the agent invoking the wrong tool.

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