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shubham4038

postgres-mcp-js

by shubham4038

analyze_table_bloat

Identify table and index bloat caused by dead tuples to receive vacuum recommendations and improve database performance.

Instructions

Detect table and index bloat from dead tuples. Returns vacuum recommendations.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
databaseNoDatabase alias to query. Omit to use the primary database.
Behavior2/5

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

With no annotations provided, the description must cover behavioral traits. It only states the primary action and output, omitting whether the operation is read-only, requires special permissions, or any side effects.

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

Conciseness5/5

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

Two sentences totaling 11 words are highly concise and front-loaded with the key action and output. No superfluous information.

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

Completeness4/5

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

For a low-complexity tool with one optional parameter and no output schema, the description sufficiently conveys purpose and return value. Could mention safety (read-only) but not essential.

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% (single parameter 'database' described). The description adds no parameter details beyond the schema, so baseline score of 3 applies.

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 tool's purpose: 'Detect table and index bloat from dead tuples' with a specific verb (detect) and resource (table and index bloat). It also mentions output (vacuum recommendations), which distinguishes it from sibling tools like analyze_db_health or analyze_locks.

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. It neither specifies prerequisites nor suggests scenarios where other tools (e.g., analyze_db_health) would be more appropriate.

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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