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

No annotations are provided, so the description carries the full burden. It does not say whether notes/tags overwrite or append, whether omitting a field leaves it unchanged, whether the client must already exist, or what permission or error behavior to expect. For a mutation tool with zero annotation coverage this is a significant gap.

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 efficient sentence with the verb and target front-loaded and no wasted words. It is terse to the point of under-specifying behavior, but the size itself is appropriate.

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 mutating CRM tool with no annotations and no output schema, the description leaves key operational questions unanswered: update-vs-replace semantics for tags and notes, required pre-existing state, and return behavior. The thorough schema helps but does not cover mutation semantics.

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 100% and each parameter (email, notes, tags) is described, so the schema does the heavy lifting. The description adds nothing about semantics and even references "lifecycle details," which has no corresponding parameter, mildly muddying the mapping.

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 ("Update") and resource (client record in Client 360 CRM) and names the fields touched, which distinguishes it from read-oriented siblings like get_client and search_clients. It does not explicitly contrast with those siblings, but the mutation framing is unambiguous.

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 guidance on when to use this instead of get_client or search_clients, and no preconditions (e.g., client must already exist, email is used as the lookup key). The agent must infer all usage context.

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