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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description adds "Returns the created secretsmanager record" and consistency about creating a new record, but says nothing about auth requirements, the nested `auth` object, or side effects for a mutation that annotations flag as destructive. With annotations carrying the burden, a 3 is appropriate.

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?

Front-loads the action correctly, but "Create a secretsmanager" and "Creates a new record" are redundant, and "Requires the secretsmanager fields in the request body" is filler that names nothing. Three sentences where two would suffice.

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?

An output schema exists, so return values needn't be explained (though the description does so anyway). For a 5-parameter create with a nested `auth` object and a 60% schema coverage gap, the description leaves the agent without enough on what the required `auth` values must look like or what a successful creation implies.

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 60%, so several parameters (notably `type`'s 11-value enum and `name`) rely on the schema alone. The description only offers the vague "Requires the secretsmanager fields in the request body" without naming any field, adding essentially no meaning over the schema and leaving the nested `auth` object uncharacterized.

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+resource ("Create a secretsmanager in the connected account") and explicitly distinguishes itself from the read counterpart by naming `get_unified_secretsmanager`. An agent can tell this apart from list/get siblings without opening the 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?

Gives clear context for creation and names one alternative ("to fetch a single secretsmanager by its ID, use `get_unified_secretsmanager`"). It stops short of full when/when-not guidance – no mention of the list tool or of prerequisites before creating – but the routing hint is concrete.

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