x_open_profile

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

No annotations are provided, so the description carries the full burden. 'Open' suggests a navigation/UI action that produces a view rather than a data payload, but the description never confirms this, states whether anything is mutated or persisted, or indicates what the agent sees afterward.

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?

One short sentence, front-loaded with the verb and resource, with zero waste. It is arguably under-specified rather than over-verbose, but it is efficient for a one-parameter tool.

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 simple (1 param, no nested objects, no output schema) so a minimal description is defensible, but it leaves an important ambiguity unresolved: whether 'open' navigates a UI context or returns profile data, which matters for sequencing with x_extract_profile and x_get_profile_posts.

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 description coverage is 100% and the single parameter is fully documented ('X username without @'). The description adds nothing beyond 'by username', so the baseline 3 applies.

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 ('Open') and resource ('a profile'), with the lookup key named. It contrasts implicitly with siblings like x_extract_profile and x_search_profiles, but does not explicitly say how 'open' differs from 'extract' or 'get_profile_posts'.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as x_extract_profile or x_search_profiles. The agent must infer from the name alone when to navigate to a profile rather than extract or search for one.

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