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Nam088

mcp-server-db

by Nam088

pg_list_views

List all views in a PostgreSQL schema. Filter by schema and connection to focus results.

Instructions

List all views in the specified schema.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
schemaNoSchema to filter by. Defaults to the connection's defaultSchema (or 'public').
connectionIdNoId of the postgres connection to use, from databases.config.yml. Optional when only one postgres connection is configured.
Behavior2/5

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

No annotations are provided, so the description should disclose behavioral traits. It only states the basic operation without mentioning read-only nature, permissions, performance considerations, or 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.

Conciseness4/5

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

The description is a single concise sentence with no wasted words. It is front-loaded with the action, but lacks details that could be added without bloat.

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?

The description does not hint at return values (e.g., view names or definitions), which is important since no output schema is provided. It is minimally complete for a simple listing but leaves ambiguity about output.

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 schema already fully describes both parameters. The description does not add additional meaning beyond referencing 'specified schema,' meeting the baseline of 3.

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 the action ('List all views') and the scope ('in the specified schema'), distinguishing it from sibling tools like pg_list_tables (list tables) and pg_list_materialized_views.

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, such as when not to use it or comparisons to pg_list_tables or other schema-listing tools. The description only states what it does.

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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