huddo_update_avatar

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

No annotations are supplied, so the description carries the full behavioral burden. It discloses accepted formats and library ids, but says nothing about whether the existing avatar is overwritten, whether any permission/identity requirement applies, or the persistence of the change for what is clearly a mutation operation.

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?

A single front-loaded sentence enumerating the two input modes with zero filler. Every element earns its place and the key information (what it sets, what it accepts) comes first.

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 simple 2-parameter mutation with no output schema, the input side is reasonably covered, but with no annotations the behavioral side (overwrite semantics, permissions, error cases) is thin. Adequate but with a clear gap.

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 50%: the 'as' parameter is documented in the schema, while path_or_library_id is not. The description compensates well by specifying the accepted image formats and giving concrete library id examples, adding meaning the schema lacks.

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+resource ('Set the avatar') and enumerates accepted input forms, which clearly separates it from siblings like huddo_update_name and huddo_update. However, it never explicitly distinguishes itself from those siblings by name or scope, so it lands at 4 rather than 5.

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 gives no when-to-use, when-not-to-use, or alternative guidance. It does not say how this differs from the other update tools in the sibling set, leaving the agent to infer the context entirely.

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