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postConstraint

Create primary key, foreign key, unique, or check constraints on database tables by providing schema, table, and constraint definition.

Instructions

Create constraint(s).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
schemaYesSchema name
tableYesTable name
requestBodyYes
Behavior2/5

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

No annotations are present, and the description gives no behavioral insights beyond 'create'. It omits details about idempotency, error handling, side effects, or whether constraints can be updated or deleted later.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with two words. It is front-loaded and efficient, but it could be slightly expanded to include key details about the constraint types without becoming verbose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of constraint creation (multiple types like primary, foreign, unique, check) and the lack of an output schema, the description is incomplete. It does not mention return values, success conditions, or how multiple constraints can be created.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 67%, and the tool description adds no additional meaning beyond the schema's built-in descriptions. Parameters like schema and table are briefly described, but requestBody nested properties are not summarized in the description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Create constraint(s).' clearly states the verb ('create') and resource ('constraint'), distinguishing it from other post tools like postClient or postTable. However, it does not explicitly mention that it operates on table constraints, leaving some ambiguity.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives such as postColumn or postIndex. There are no prerequisites, exclusions, or context for when not to use it.

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

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