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Yash-0620

postgres-mcp

by Yash-0620

get_object_details

Read-only

Retrieve detailed metadata for database objects like tables, views, sequences, or extensions in a specific schema.

Instructions

Show detailed information about a database object

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
object_nameYesObject name
object_typeNoObject type: 'table', 'view', 'sequence', or 'extension'table
schema_nameYesSchema name

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

Annotations provide readOnlyHint=true, so the safety profile is covered. The description adds no extra behavioral context (e.g., what 'detailed' includes). With annotations, this is adequate but minimal.

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 that is concise and front-loaded with purpose. No wasted words, but could be slightly more informative.

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

Completeness3/5

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

Given the output schema exists, the tool is adequately described for its low complexity. However, the description lacks detail on what information is returned (e.g., column details, types).

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 parameters are documented. The description does not add additional meaning beyond the schema (e.g., examples or constraints). Baseline 3 is appropriate.

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 clearly states the tool shows detailed information about a database object, using a specific verb and resource. It distinguishes from siblings like list_objects (which lists objects) but does not explicitly differentiate this tool's scope.

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 versus alternatives like list_objects or explain_query. The description is purely declarative without context for selection.

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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