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

The description simply says 'update', which aligns with the destructiveHint=true annotation, but adds no additional behavioral context such as whether the update replaces the entire schema or just specific fields. No side effects, failure modes, or prerequisites are mentioned beyond what the annotations imply.

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?

The description is a single, concise sentence with no filler or redundancy. It directly states the action and target, making it highly scannable and appropriately sized for the tool's simplicity.

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?

The description and parameter details provide enough basic information to attempt a call, but there is no mention of preconditions (e.g., schema must already exist), potential result behavior, or differences from schema_save. This is adequate for a simple update but leaves some contextual gaps.

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?

All four parameters have individual descriptions that clearly explain their roles (e.g., schema_uuid identifies the target, schema_content provides the full definition). These descriptions are sufficient on their own, and the tool description does not add extra semantic value beyond them.

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 clearly states the verb 'update' and the resource 'schema definition', making the core purpose unambiguous. The word 'existing' distinguishes it from creation, though it does not explicitly differentiate from schema_save.

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 is provided on when to use this tool versus alternatives like schema_save or schema_delete. The description is purely functional and offers no context for selection.

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