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

The readOnlyHint=true, destructiveHint=false, and openWorldHint=false annotations already fully convey the safety profile, so the description's job is only to add context beyond that. It does add value by specifying the payload is full source code (HTML/CSS/JS) rather than metadata, but says nothing about size limits, versioning, or whether a missing component errors versus returns empty.

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 with no filler; the return format leads and the use case follows. It is compressed to the point of being telegraphic, which slightly undercuts clarity without wasting any space.

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?

There is no output schema, so the description correctly carries the burden of saying what comes back ('Full HTML/CSS/JS'), which it does at a high level. For a two-parameter fetch tool it is roughly adequate, but the missing id provenance and undefined not-found behavior leave real gaps.

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 only 50%: projectId is documented in the schema, but id has no description anywhere, and the description does not compensate by saying it is a component identifier obtainable from list_components. With half the parameters undocumented, the agent is left to infer the key required input's origin.

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 states a specific verb and resource ('Full HTML/CSS/JS of a component'), making it clearly distinct from siblings like list_components, save_component, and delete_component. It stops short of explicitly naming those siblings, so it earns a 4 rather than a 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 parenthetical 'to adapt it or learn the house style' gives a genuine use case, which is more than nothing. However, it offers no when-not guidance and never tells the agent that list_components is the way to discover a valid id before calling this tool.

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