Roblox MCP

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It adequately explains what each of the three actions does (emit burst, clear particles, toggle state), but omits important behavioral details such as error handling when paths don't exist, performance implications of particle emission, or whether changes persist.

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 compact and front-loaded with the domain identifier, though the colon-separated structure reads as telegraphic rather than a complete sentence. The '[PRO]' tag at the start appears to be metadata. Zero wasted words, though slightly fragmented syntax.

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?

Given 100% schema coverage and no output schema to explain, the description provides a sufficient high-level overview. However, for a mutation tool with no annotations and no output schema disclosure, it lacks completeness regarding side effects, return values, or failure modes that would help an agent predict outcomes.

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%, providing detailed descriptions for all four parameters including the enum values. The description adds minimal semantic value beyond the schema, serving mainly as a high-level summary that restates the action capabilities already documented in the action parameter.

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 identifies the domain (Particle effects) and enumerates the three specific operations supported (emit, clear, toggle). It distinguishes itself from siblings like manage_animation or manage_audio by specifying the particle effects resource, though it lacks an explicit verb like 'Manage' or 'Control' at the start.

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?

No explicit guidance is provided on when to use this tool versus alternatives (e.g., manage_properties for toggling enabled states, or mutate_instances for clearing). The description only lists capabilities without advising on selection criteria or prerequisites.

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