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

No annotations are provided, so the description carries the burden. It discloses that the workspace is ephemeral and in-memory (a key behavioral trait — data is lost unless create_shared is called), and mentions no cloud id is created. This is meaningful transparency. However, it doesn't clarify what happens on reuse/discard, memory limits, or whether calling it repeatedly creates separate workspaces, which would be relevant for an ephemeral resource.

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?

The description is a single compact sentence that packs key information: ephemeral, default, optional seed params, and the create_shared relationship. Minimal waste. Could arguably drop 'and/or markup' but it's informative. Efficient and front-loaded.

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 constructor tool with 2 optional params, full schema coverage, no output schema, the description covers the essentials: what it does, ephemeral nature, and relationship to create_shared. Gaps include lack of detail on lifetime/cleanup (roadflow_discard relationship) and return value expectations, but for a low-complexity creation tool this is reasonably 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 100% — both json and markup have schema descriptions. The description adds the context that these are optional and applied to the new workspace, but doesn't add meaning beyond the schema's own descriptions. The 'same shape as serializeState' hint for json lives in the schema, not the description. Baseline 3 is appropriate given full schema coverage.

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 clearly states the tool creates an ephemeral in-memory roadflow workspace. It distinguishes from siblings by noting 'default' (vs shared workspace via create_shared) and mentions both optional seed JSON and markup, differentiating from roadflow_apply_json and roadflow_apply_markup which operate on existing workspaces.

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 implies usage context by noting 'ephemeral in-memory' and default behavior, and contrasts with create_shared via 'No cloud id until create_shared'. However, it doesn't explicitly state when to use this vs apply_json/apply_markup alternatives, nor does it clarify whether the optional json/markup params are meant to be passed inline versus applied later with sibling tools.

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