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

The description adds genuine merge semantics ("others are kept") that the annotations do not convey, plus retry behavior for idempotencyKey. However, it does not reconcile this with destructiveHint=true — an agent is left not knowing which overwrites can lose data, or whether omitted arrays (e.g. staff, faqs) are replaced or preserved.

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?

Three short, front-loaded sentences with no filler; the patch semantics and retry rule each earn their place. Minor loss: "Step 2: Teach it the business" is motivational framing rather than operational detail.

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 24-parameter, deeply nested mutation with no output schema and near-zero schema descriptions, the description is far too thin. An agent cannot infer which fields are patchable, how nested objects merge, or what a successful response confirms.

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 only 8% across 24 parameters, so the description carries nearly the full burden and does not meet it. It only elaborates idempotencyKey and never enumerates or explains the top-level fields that can be patched, the nested evidence/vibe structures, or nullable-vs-omit semantics.

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 names a specific verb and resource ("Update some top-level fields of the knowledge profile") and clarifies the partial-update semantics ("others are kept"), which implicitly differentiates it from the sibling put_knowledge replacement tool. The onboarding framing ("Step 2: Teach it the business") adds workflow position, though the sibling it contrasts with is never named.

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 "Step 2" framing implies sequence within an onboarding flow, but there is no explicit statement of when to choose this over ringkit_put_knowledge, ringkit_set_knowledge_tier, or ringkit_import_knowledge. With zero required parameters, the description also omits the critical guidance that at least one field must be supplied for the call to do anything.

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