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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered; 'Changes nothing' reinforces but largely repeats that. The useful addition is the disclosure of what the call returns (role, rules, companion tools, project pages, business brief), which is real behavioral context beyond the annotations.

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 dense paragraph that front-loads the core action, then the role list, then the trigger examples and the read-only guarantee. No filler sentences; every clause carries either scope, routing, or safety information.

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?

No output schema exists, yet the description compensates by enumerating what the call returns, which is exactly the missing piece. The only shortfall is unexplained handling of projectId and how the request string influences the response, but for a read-only role-loading tool this is close to complete.

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 67% and the enum values already exist in the schema, but the description adds genuine meaning by mapping each agent id to its job (site-planner=pages, designer=look, copywriter=words, seo-specialist=search, reviewer=final pass). The 'request' and 'projectId' parameters are not addressed in the description, leaving that gap to the schema.

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 concrete verb and resource ('Work as one of the UiChemy editor's sidebar agents') and enumerates the five roles with one-word scope hints (pages, look, words, search, final pass). It also tells the agent what comes back (role, rules, companion uichemy_* tools, pages, business brief), which distinguishes it from action siblings like uichemy_plan_site or uichemy_review_site.

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?

Gives explicit trigger conditions with quoted example utterances ('act as the copywriter', 'plan my pages', 'review my site'), so the agent knows when to route here. It stops short of naming when NOT to use it or which concrete sibling tool to prefer for a single action, so it is strong but not a full when/when-not/alternatives mapping.

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