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

With no annotations, the description carries the full burden. It does disclose two useful traits: the pricing model ($0.50 USDC via x402, charged only on success) and the key preservation guarantee that untouched zones keep their exact transforms. It does not say whether edited zones are replaced or augmented, whether the operation is reversible, or whether auth is required.

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 compact clauses, front-loaded with the action and its effect. The trailing 'Part of Level design: Level dressing for 3D games' is mildly decorative but provides category context. No wasted sentences overall.

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 tool with a complex nested schema and no annotations or output schema, the description covers the core action, preservation semantics, and pricing but leaves significant gaps: what jobId refers to, what a successful response contains, and how edited zones are treated. Adequate but not 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 0% and the schema is large and deeply nested (edits with per-zone rules across six rule kinds). The description only loosely gestures at the two modes ('instruction or structured zone edits'), leaving jobId, zoneId, and the entire rule vocabulary undocumented in prose. It adds little meaning beyond 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 specific verb (change/revise) on a specific resource (a placed level) and names the two modes of operation (instruction or structured zone edits). This distinguishes it from level_design_place (which places rather than revises), though it does not name that sibling explicitly.

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?

Usage is implied: use this to modify an already-placed level, offering either a natural-language instruction or structured edits. There is no explicit when-not guidance, no mention of prerequisites (e.g., that a jobId must reference an existing placement), and no routing to level_design_place_2d or level_design_revise_2d.

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