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uc_table_update

Update a Unity Catalog table's properties by specifying its full name and the fields to modify.

Instructions

Update a table (PATCH /api/2.1/unity-catalog/tables/{full_name}).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
full_nameYesTable full name (catalog.schema.table)
bodyYesPATCH body — any updateable table field

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

Annotations already indicate mutability (readOnlyHint=false). The description adds no additional behavioral details (e.g., partial vs full update, effects on existing properties, error conditions).

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

Conciseness3/5

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

The description is concise at one sentence, but it lacks important context. It is not verbose, but could be more informative without increasing length substantially.

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?

Despite having an output schema, the description does not explain update semantics (e.g., whether body replaces or merges). The lack of clarity on parameter usage and effects makes it incomplete for an agent to use confidently.

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?

Input schema has 100% coverage: both 'full_name' and 'body' are described adequately in the schema. The description does not add further meaning beyond the schema.

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?

Description states 'Update a table' with a specific API endpoint, clearly naming the action and resource. It distinguishes from siblings like uc_table_create and uc_table_delete, but does not elaborate on what aspects of the table can be updated.

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 on when to use this tool vs alternatives. No prerequisites, context, or conditional advice is provided. The description is purely functional.

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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