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

The annotations already declare this is a non-read-only, non-idempotent, non-destructive mutation. The description usefully adds that expectedSpecVersion is required to prevent stale writes, which explains optimistic concurrency behavior. It does not explain whether the popup config replaces existing settings or what errors occur on version mismatch.

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?

Two tight sentences: the purpose is front-loaded and the concurrency requirement follows immediately. There is no boilerplate or wasted wording.

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 mutation tool with a complex nested schema and no output schema, the description covers the high-level purpose and the version prerequisite. It leaves out replacement semantics, error behavior on stale versions, and when to use it instead of related popup/bubble tools, so it is only minimally 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 description coverage is reported as 0% at the top level, though nested fields have some documentation. The description only adds meaning for expectedSpecVersion, explaining its stale-write prevention role; it does not clarify projectId, layerId, or the nested input structure beyond what the schema already contains.

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: configuring popup presentation and feature attributes in a project map. It is clear what the tool does, but it does not explicitly distinguish itself from siblings like studio_set_basic_popup or project_configure_bubbles.

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?

It does not say when to choose this tool over studio_set_basic_popup or project_configure_bubbles, nor does it describe prerequisites beyond the expectedSpecVersion concurrency requirement. Usage is only implied by the tool name and purpose statement.

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