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

Annotations already declare readOnlyHint=true, so the safety profile is carried by structured data, and the description is consistent with it. The description earns credit for disclosing the alias prerequisite, which is genuine behavioral context not present in the annotations or the empty schema. It stops short of the higher bar because it says nothing about failure behavior when no alias exists or how large the returned profile payload can be.

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?

Two sentences, zero waste. The payload contents are front-loaded in the first sentence and the blocking prerequisite follows immediately, which is the order an agent needs to plan a call.

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 read-only, zero-parameter getter with no output schema, the description does the necessary work by enumerating the returned fields and stating the alias precondition. The remaining ambiguity — own versus public profile — is the only thing an agent might still get wrong when picking among the ~15 read siblings.

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 tool takes zero parameters, which is the baseline-4 case; there is nothing for the description to disambiguate. The field list it does provide is about return values rather than inputs, so it neither helps nor hurts this dimension.

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?

Names a specific verb ('Get') and resource ('the user's current profile') and enumerates the returned fields (display name, bio, blocks, social links, theme, custom CSS, published status), which tells an agent exactly what it will receive. It falls short of 5 only because it never contrasts itself with the sibling get_public_profile, so an agent must infer that this returns the authenticated user's own profile rather than a public one.

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?

Explicitly states a prerequisite — an alias must be set first — and routes the agent to the right siblings to satisfy it: get_alias to check, create_alias to set one. That is real when-to-use guidance. The one gap is the absence of any exclusion clause or comparison against get_public_profile/get_profile_analytics for the adjacent use cases.

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