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pbi_create_table

Automate creation or update of calculated tables in Power BI Desktop semantic models. Define table name and DAX expression, with options to hide or refresh.

Instructions

Create or update a calculated table.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
is_hiddenNo
overwriteNo
expressionYes
refresh_after_createNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations, the description must disclose behavioral traits. It only states 'Create or update' but does not explain what triggers an update vs creation, potential side effects, or required permissions. The overwrite and refresh parameters imply destructive behavior but are not described.

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 single-sentence description is concise but omits critical details. It front-loads the core action but lacks structure for parameter or usage guidance.

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 tool has 5 parameters and an output schema, the description fails to cover return values, parameter roles, or usage context. It is insufficient for an agent to invoke the tool correctly.

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

Parameters1/5

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

Schema description coverage is 0%, yet the description provides no explanation of the five parameters (name, expression, is_hidden, overwrite, refresh_after_create). It adds no meaning beyond the schema names.

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 explicitly states 'Create or update a calculated table,' which is a specific verb-resource pairing. It clearly distinguishes from sibling tools like pbi_create_measure or pbi_create_column by specifying 'table' as the resource.

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 like pbi_create_measure, pbi_create_column, or pbi_delete_table. The description lacks context on prerequisites 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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