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

Annotations already signal the mutation/destructive behavior (readOnlyHint=false, destructiveHint=true), so the description does not need to repeat that. It adds the contextual detail 'for grouping social accounts' but does not disclose any further side effects, prerequisites, or failure modes.

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 concise, front-loaded sentence. It clearly states the action and purpose with zero filler.

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 tool is straightforward, the schema documents all parameters, and an output schema exists. The description plus schema provide enough information for an agent to create a profile correctly, though a bit more detail about naming rules or side effects would push it higher.

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%, so the parameters are fully documented in the schema itself. The description adds no additional parameter semantics beyond naming the purpose, which is acceptable given the baseline of 3 for complete schema coverage.

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 ('create') and resource ('profile'), and explains the purpose ('grouping social accounts'). This clearly distinguishes it from sibling operations like profiles_update, profiles_delete, and profiles_list.

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 description implies when to use the tool (when creating a new profile), but it does not explicitly state when not to use it or mention alternative tools such as profiles_update for modifying existing profiles. Some guidance is left to inference from sibling names.

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