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

With no annotations, the description carries the full burden. It usefully discloses rate-limiting behavior ('minute-level abuse protection', 'capacity budget') and that acknowledgements are mandatory, which is real behavioral context. But it omits failure/error behavior, what happens on a rejected acknowledgement, and what 'declared capability' concretely means.

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 action, with no obvious padding. However it is dense with undefined jargon that costs more reader effort than it saves, and the mandatory-acknowledgement note is the only concrete operational fact.

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?

A 5-parameter, all-required tool with a nested acknowledgement object, 0% schema description coverage, and no annotations or output schema. The description explains none of the identifiers, the payload shape, or the request_id role, leaving the agent under-equipped to call it correctly.

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 0% across 5 required parameters, so the schema documents none of them. The description only indirectly touches grow_acknowledgement via 'explicit privacy and no-effect acknowledgements are mandatory' and says nothing about engine_id, capability_id, payload, or request_id semantics. It does not come close to compensating for the coverage gap.

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 'Invoke' and resource 'GROW capability' are stated, so the core action is identifiable. However, the purpose is buried under opaque qualifiers ('declared non-effect, non-binding', 'provider-aligned capacity budget') and no sibling tool is named, so an agent cannot cleanly distinguish it from saash_grow_share_experience without further inference.

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?

The description gives eligibility conditions for invocation ('only ... with no per-client daily quota'), which is implied guidance on when this tool is permissible. But there is no explicit when-to-use-vs-siblings routing, no naming of saash_gateway_discover or saash_resolve as alternatives, and no prerequisites for obtaining an eligible capability first.

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