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

Annotations establish that the operation is mutating but non-destructive; the description adds that position, width, and height use sensible defaults. However, it does not explain what those defaults are, whether placement could overlap existing content, or any side effects, and it references fields not present in the schema.

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 one short sentence with the action front-loaded. However, 'sensible defaults' is vague, and the mention of non-existent position/width/height parameters adds minor confusion, so it is not maximally clean.

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 and the input schema includes helpful source hints like 'from list_pages' and 'from list_clients'. Still, the description's inconsistency about position/width/height and its lack of details on default behavior leave gaps for an agent deciding whether and how to invoke this tool.

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?

The schema has 100% coverage for all five parameters, providing a baseline of 3. But the description mentions 'position, width, and height' which are not in the schema, potentially misleading agents into expecting controls that do not exist. This mismatch reduces the value the description adds beyond the schema.

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 action (Add) and the resource (a title widget) plus the target (a page), which distinguishes it from sibling add_*_widget tools. It is concise and immediately understandable, though it does not explicitly differentiate itself from add_text_widget or others.

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 given about when to use this tool versus the many sibling add_*_widget tools, nor any exclusions or prerequisites. The mention of 'sensible defaults' implies a use case but does not specify when defaults are appropriate or when another widget tool should be chosen.

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