create_coupling_constraint

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, but it only states that a constraint is created and lists coupling_type values. It does not mention that the control point should be an existing reference point, that the surface must already exist, or that the DOF flags default to constrained behavior.

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 short and readable, but its 'Args:' section is misleadingly incomplete, presenting coupling_type as if it were the only argument. The brevity comes from omission rather than effective compression.

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 12-parameter creation tool with no annotations and no schema descriptions, this is far from complete. Required parameters, DOF flag meanings, defaults, and prerequisites are all missing; an output schema exists but does not compensate for the lack of input guidance.

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%, so the description should compensate by explaining parameters. It adds some value by listing valid coupling_type values, but it leaves the required parameters (name, control_point, surface_name) and the six DOF booleans (u1, u2, u3, ur1, ur2, ur3) undocumented.

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 uses a specific verb ('Create') and resource ('coupling constraint between a reference point and a surface'), which helps distinguish it from sibling tools like create_tie or create_mpc_constraint. However, it does not explain the mechanical meaning of a coupling constraint beyond the name.

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?

There is no guidance on when to use this tool versus alternatives such as create_rigid_body_constraint, create_mpc_constraint, create_equation_constraint, or create_tie. No prerequisites, exclusions, or selection criteria are provided, so the agent must infer applicability.

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