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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered; the description adds real context beyond that by enumerating the three surfaces the project can open in and by disclosing the no-projectId fallback behavior. It omits any note about what happens if the projectId is invalid or whether the open is synchronous.

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?

Three short sentences, front-loaded with the primary action and destinations, then the trigger condition, then the edge-case fallback. No filler or repetition of the title.

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 navigation tool with full schema coverage and explicit annotations, the description supplies the destination semantics and the missing-parameter behavior an agent needs. The only real gap is disambiguation from the sibling uichemy_open_projects, which has overlapping dashboard-opening behavior.

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%, so all three parameters (view, pageName, projectId) are already documented in the schema, including enum meanings and defaults. The description only echoes the 'preview' value and adds no syntax or constraint beyond what the schema provides — baseline 3 is appropriate.

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?

Specific verb+resource ('Open a UiChemy project') with three explicit destinations: embedded ChatGPT view, the canvas editor, and a full-page single-page preview. It stops short of naming its near-twin sibling uichemy_open_projects, so the agent must infer which of the two 'open' tools to pick when no projectId is given.

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?

'Call it after changing a project so the user sees the result' gives a clear triggering condition, and the no-projectId dashboard fallback is stated explicitly. It does not, however, say when to prefer uichemy_open_projects over this tool, which is the obvious alternative given the sibling list.

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