googleapis--mcp-toolbox/docs/en/integrations/postgres/tools/postgres-list-indexes.md

title, type, weight, description

title	type	weight	description
postgres-list-indexes	docs	1	The "postgres-list-indexes" tool lists indexes in a Postgres database.

About

The postgres-list-indexes tool lists available user indexes in the database excluding those in pg_catalog and information_schema.

postgres-list-indexes lists detailed information as JSON for indexes. The tool takes the following input parameters:

• table_name (optional): A text to filter results by table name. Default: ""
• index_name (optional): A text to filter results by index name. Default: ""
• schema_name (optional): A text to filter results by schema name. Default: ""
• only_unused (optional): If true, returns indexes that have never been used.
• limit (optional): The maximum number of rows to return. Default: 50.

Compatible Sources

{{< compatible-sources others="integrations/alloydb, integrations/cloud-sql-pg">}}

Example

kind: tool
name: list_indexes
type: postgres-list-indexes
source: postgres-source
description: |
  Lists available user indexes in the database, excluding system schemas (pg_catalog, 
  information_schema). For each index, the following properties are returned: 
  schema name, table name, index name, index type (access method), a boolean 
  indicating if it's a unique index, a boolean indicating if it's for a primary key,
  the index definition, index size in bytes, the number of index scans, the number of 
  index tuples read, the number of table tuples fetched via index scans, and a boolean 
  indicating if the index has been used at least once. 

The response is a json array with the following elements:

{
 "schema_name": "schema name", 
 "table_name": "table name",
 "index_name": "index name",
 "index_type": "index access method (e.g btree, hash, gin)",
 "is_unique": "boolean indicating if the index is unique",
 "is_primary": "boolean indicating if the index is for a primary key",
 "index_definition": "index definition statement",
 "index_size_bytes": "index size in bytes",
 "index_scans": "Number of index scans initiated on this index",
 "tuples_read": "Number of index entries returned by scans on this index",
 "tuples_fetched": "Number of live table rows fetched by simple index scans using this index", 
 "is_used": "boolean indicating if the index has been scanned at least once"
}

Reference

field	type	required	description
type	string	true	Must be "postgres-list-indexes".
source	string	true	Name of the source the SQL should execute on.
description	string	false	Description of the tool that is passed to the agent.