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

With no annotations, the description carries the full behavioral burden, yet it discloses almost nothing. It implies a write but says nothing about duplicate handling, idempotency, required-field validation errors, permissions, or what the returned identifier looks like. 'in the account' is the only extra context.

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 sentence with no padding, so nothing is wasted. However, the extreme brevity looks like under-specification rather than disciplined concision for a 7-parameter mutation.

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 create/mutation tool with zero annotations and no output schema, the description should address duplicates, failures, and return behavior. None of that is present, leaving an agent under-informed before a write.

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 100%, so all seven parameters including required-vs-optional are already documented. The description adds no parameter meaning beyond the schema, which is the expected baseline here.

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 and resource ('Create a new client'), which is unambiguous about the operation. It does not distinguish itself from siblings like create_supplier, so an agent must infer the client-vs-supplier boundary from the names alone.

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 when-to-use guidance: nothing about checking for an existing client first (search_clients), when to prefer create_supplier, or what prerequisites exist. The sentence simply restates the operation.

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