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update_rows

Update rows in a PostgreSQL table with mandatory filters and values. Supports optional optimistic concurrency and commit validation for data integrity.

Instructions

Update typed values with mandatory filters, optimistic predicates, and commit guards

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
whereYesMandatory structured target filter
valuesYesColumns and bound replacement values
returningNoColumns returned after commit validation
concurrencyNoOptional optimistic concurrency predicates
schema_nameYesExact schema name
expected_rowsNoOptional exact affected row count
relation_nameYesExact table name
max_affected_rowsNoHard mutation ceiling
Behavior2/5

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

No annotations provided, and the description only vaguely mentions 'mandatory filters, optimistic predicates, and commit guards' without detailing behavioral traits like mutation limits or error handling.

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?

Single sentence, concise and to the point, but lacks structural elements like bullet points or separate sections.

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?

Complex tool with 8 parameters, nested objects, and no output schema; the description fails to explain return values, failure behavior, or pagination, leaving gaps.

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

Parameters3/5

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

Schema coverage is 100%, so the description adds little beyond labeling parameters as 'mandatory' and 'optimistic'. Baseline 3 is appropriate.

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

Purpose5/5

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

The description clearly states 'Update typed values' with key constraints, distinguishing it from sibling tools like insert_rows and delete_rows.

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

Usage Guidelines3/5

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

No explicit guidance on when to use this tool vs alternatives; the description implies use for updates with filters but lacks explicit context or exclusions.

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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