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saved_queries

Destructive

Personal, named library of reusable SELECT queries — save once, run by name later, instead of re-pasting SQL or scanning query_history's backward-looking log. action=save stores sql under name (fails with name_exists if taken — delete first to replace). action=run executes the stored SQL through the same read-only guard and firewall as query_sql and returns up to 100 rows. action=list returns saved queries (up to 100), optionally filtered by tag. action=delete removes one by name or id. save/run/delete write to tenant storage; list is read-only. All four actions count against daily quota. Returns the saved record, a result table (run), the query list, or a delete confirmation. [BUILD tier]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idNoQuery ID (alternative to name for run/delete)
sqlNoSQL to store (required for action=save)
tagNoFilter by tag (action=list)
nameNoQuery name (save/run/delete)
tagsNoTags (action=save)
actionYessave | run | list | delete
connectionNoTarget connection name from this tenant's inventory. Call `list_connections` to see every name + dialect, then match semantically to the user's intent (e.g. 'analytics' → a connection named `*-analytics-*`; 'prod' → a connection with `prod-` prefix). If the user didn't specify, use the tenant's default (first added). Do not invent names — resolve from `list_connections` output.
descriptionNoFreeform description (action=save)

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataNo
metaNo
displayNo
summaryNo
insightsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / properties / data / anyOf
      Previous value: -[
      -  {
      -    "items": {
      -      "additionalProperties": true,
      -      "properties": {
      -        "created": {
      -          "type": "string"
      -        },
      -        "description": {
      -          "type": "string"
      -        },
      -        "name": {
      -          "type": "string"
      -        },
      -        "runs": {
      -          "type": [
      -            "number",
      -            "string"
      -          ]
      -        },
      -        "tags": {
      -          "type": "string"
      -        }
      -      },
      -      "required": [
      -        "name"
      -      ],
      -      "type": "object"
      -    },
      -    "type": "array"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "id": {
      -        "type": "string"
      -      },
      -      "name": {
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "id",
      -      "name"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "deleted": {
      -        "type": "string"
      -      }
      -    },
      -    "required": [
      -      "deleted"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "items": {
      -      "additionalProperties": {},
      -      "type": "object"
      -    },
      -    "type": "array"
      -  },
      -  {
      -    "additionalProperties": true,
      -    "properties": {
      -      "code": {
      -        "type": "string"
      -      },
      -      "details": {
      -        "additionalProperties": {},
      -        "type": "object"
      -      },
      -      "error": {
      -        "type": "string"
      -      },
      -      "internal_code": {
      -        "type": "string"
      -      },
      -      "message": {
      -        "type": "string"
      -      },
      -      "retry_after_s": {
      -        "type": "number"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "items": {
      +      "additionalProperties": true,
      +      "properties": {
      +        "created": {
      +          "type": "string"
      +        },
      +        "description": {
      +          "type": "string"
      +        },
      +        "name": {
      +          "type": "string"
      +        },
      +        "runs": {
      +          "type": [
      +            "number",
      +            "string"
      +          ]
      +        },
      +        "tags": {
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "name"
      +      ],
      +      "type": "object"
      +    },
      +    "type": "array"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "id": {
      +        "type": "string"
      +      },
      +      "name": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "id",
      +      "name"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "deleted": {
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "deleted"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "items": {
      +      "additionalProperties": {},
      +      "type": "object"
      +    },
      +    "type": "array"
      +  },
      +  {
      +    "additionalProperties": true,
      +    "properties": {
      +      "code": {
      +        "type": "string"
      +      },
      +      "details": {
      +        "additionalProperties": {},
      +        "type": "object"
      +      },
      +      "error": {
      +        "type": "string"
      +      },
      +      "internal_code": {
      +        "type": "string"
      +      },
      +      "message": {
      +        "type": "string"
      +      },
      +      "retry_after_s": {
      +        "type": "number"
      +      }
      +    },
      +    "required": [
      +      "error"
      +    ],
      +    "type": "object"
      +  }
      +]
  2. Changed8 schema fields changed
    • addedInput schema / properties / connection / maxLength
      Added value: +256
    • addedInput schema / properties / description / maxLength
      Added value: +1000
    • addedInput schema / properties / id / maxLength
      Added value: +256
    • addedInput schema / properties / name / maxLength
      Added value: +256
    • addedInput schema / properties / sql / maxLength
      Added value: +50000
    • addedInput schema / properties / tag / maxLength
      Added value: +256
    • addedInput schema / properties / tags / items / maxLength
      Added value: +256
    • addedInput schema / properties / tags / maxItems
      Added value: +20
  3. Changed2 schema fields changed
    • addedOutput schema / properties / display / properties / map
      Added value: +{
      +  "additionalProperties": true,
      +  "properties": {
      +    "label": {
      +      "type": "string"
      +    },
      +    "lat": {
      +      "type": "string"
      +    },
      +    "lon": {
      +      "type": "string"
      +    },
      +    "title": {
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
    • changedOutput schema / properties / display / properties / type / anyOf
      Previous value: -[
      -  {
      -    "enum": [
      -      "table",
      -      "chart",
      -      "metric",
      -      "code",
      -      "text",
      -      "list"
      -    ],
      -    "type": "string"
      -  },
      -  {
      -    "type": "string"
      -  }
      -]New value: +[
      +  {
      +    "enum": [
      +      "table",
      +      "chart",
      +      "metric",
      +      "code",
      +      "text",
      +      "list",
      +      "map"
      +    ],
      +    "type": "string"
      +  },
      +  {
      +    "type": "string"
      +  }
      +]
  4. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": true,
      +  "properties": {
      +    "data": {
      +      "anyOf": [
      +        {
      +          "items": {
      +            "additionalProperties": true,
      +            "properties": {
      +              "created": {
      +                "type": "string"
      +              },
      +              "description": {
      +                "type": "string"
      +              },
      +              "name": {
      +                "type": "string"
      +              },
      +              "runs": {
      +                "type": [
      +                  "number",
      +                  "string"
      +                ]
      +              },
      +              "tags": {
      +                "type": "string"
      +              }
      +            },
      +            "required": [
      +              "name"
      +            ],
      +            "type": "object"
      +          },
      +          "type": "array"
      +        },
      +        {
      +          "additionalProperties": true,
      +          "properties": {
      +            "id": {
      +              "type": "string"
      +            },
      +            "name": {
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "id",
      +            "name"
      +          ],
      +          "type": "object"
      +        },
      +        {
      +          "additionalProperties": true,
      +          "properties": {
      +            "deleted": {
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "deleted"
      +          ],
      +          "type": "object"
      +        },
      +        {
      +          "items": {
      +            "additionalProperties": {},
      +            "type": "object"
      +          },
      +          "type": "array"
      +        },
      +        {
      +          "additionalProperties": true,
      +          "properties": {
      +            "code": {
      +              "type": "string"
      +            },
      +            "details": {
      +              "additionalProperties": {},
      +              "type": "object"
      +            },
      +            "error": {
      +              "type": "string"
      +            },
      +            "internal_code": {
      +              "type": "string"
      +            },
      +            "message": {
      +              "type": "string"
      +            },
      +            "retry_after_s": {
      +              "type": "number"
      +            }
      +          },
      +          "type": "object"
      +        }
      +      ]
      +    },
      +    "display": {
      +      "additionalProperties": true,
      +      "properties": {
      +        "chart": {
      +          "additionalProperties": true,
      +          "properties": {
      +            "chartType": {
      +              "type": "string"
      +            },
      +            "color": {
      +              "type": "string"
      +            },
      +            "title": {
      +              "type": "string"
      +            },
      +            "x": {
      +              "type": "string"
      +            },
      +            "xLabel": {
      +              "type": "string"
      +            },
      +            "y": {
      +              "anyOf": [
      +                {
      +                  "type": "string"
      +                },
      +                {
      +                  "items": {
      +                    "type": "string"
      +                  },
      +                  "type": "array"
      +                }
      +              ]
      +            },
      +            "yLabel": {
      +              "type": "string"
      +            }
      +          },
      +          "type": "object"
      +        },
      +        "code": {
      +          "additionalProperties": true,
      +          "properties": {
      +            "executable": {
      +              "type": "boolean"
      +            },
      +            "language": {
      +              "anyOf": [
      +                {
      +                  "enum": [
      +                    "sql",
      +                    "json",
      +                    "bash",
      +                    "typescript"
      +                  ],
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "string"
      +                }
      +              ]
      +            },
      +            "title": {
      +              "type": "string"
      +            }
      +          },
      +          "type": "object"
      +        },
      +        "metric": {
      +          "additionalProperties": true,
      +          "properties": {
      +            "label": {
      +              "type": "string"
      +            },
      +            "status": {
      +              "anyOf": [
      +                {
      +                  "enum": [
      +                    "good",
      +                    "warning",
      +                    "critical"
      +                  ],
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "string"
      +                }
      +              ]
      +            },
      +            "trend": {
      +              "anyOf": [
      +                {
      +                  "enum": [
      +                    "up",
      +                    "down",
      +                    "neutral"
      +                  ],
      +                  "type": "string"
      +                },
      +                {
      +                  "type": "string"
      +                }
      +              ]
      +            },
      +            "trendValue": {
      +              "type": "string"
      +            },
      +            "unit": {
      +              "type": "string"
      +            },
      +            "value": {
      +              "type": [
      +                "string",
      +                "number"
      +              ]
      +            }
      +          },
      +          "type": "object"
      +        },
      +        "type": {
      +          "anyOf": [
      +            {
      +              "enum": [
      +                "table",
      +                "chart",
      +                "metric",
      +                "code",
      +                "text",
      +                "list"
      +              ],
      +              "type": "string"
      +            },
      +            {
      +              "type": "string"
      +            }
      +          ]
      +        }
      +      },
      +      "type": "object"
      +    },
      +    "insights": {
      +      "items": {
      +        "additionalProperties": true,
      +        "properties": {
      +          "column": {
      +            "type": "string"
      +          },
      +          "message": {
      +            "type": "string"
      +          },
      +          "severity": {
      +            "anyOf": [
      +              {
      +                "enum": [
      +                  "info",
      +                  "warning",
      +                  "critical"
      +                ],
      +                "type": "string"
      +              },
      +              {
      +                "type": "string"
      +              }
      +            ]
      +          },
      +          "value": {}
      +        },
      +        "required": [
      +          "severity",
      +          "message"
      +        ],
      +        "type": "object"
      +      },
      +      "type": "array"
      +    },
      +    "meta": {
      +      "additionalProperties": true,
      +      "properties": {
      +        "cacheHit": {
      +          "type": "boolean"
      +        },
      +        "connection": {
      +          "type": "string"
      +        },
      +        "dialect": {
      +          "anyOf": [
      +            {
      +              "enum": [
      +                "postgres",
      +                "mysql",
      +                "mssql"
      +              ],
      +              "type": "string"
      +            },
      +            {
      +              "type": "string"
      +            }
      +          ]
      +        },
      +        "executionTimeMs": {
      +          "$ref": "#/properties/data/anyOf/0/items/properties/runs"
      +        },
      +        "plan": {},
      +        "rowCount": {
      +          "$ref": "#/properties/data/anyOf/0/items/properties/runs"
      +        },
      +        "tool": {
      +          "type": "string"
      +        },
      +        "truncated": {
      +          "type": "boolean"
      +        }
      +      },
      +      "type": "object"
      +    },
      +    "summary": {
      +      "type": "string"
      +    }
      +  },
      +  "type": "object"
      +}
  5. First observed

TDQS

A4.2/5.0
Behavior4/5

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

Annotations declare destructiveHint=true and readOnlyHint=false. The description adds valuable context: save/run/delete write to tenant storage, list is read-only, all actions count against daily quota, save fails with name_exists if taken, and run uses the same read-only guard and firewall as query_sql with a 100-row limit. No contradiction with annotations.

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 dense single paragraph but well-organized: it opens with the purpose, then enumerates actions and their semantics, then notes on storage and returns. It covers a lot in about five sentences without redundancy, though a more structured layout could improve scanability.

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

Completeness5/5

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

The description is thorough for a multi-action tool: it explains error behavior (name_exists), quota impact, read/write semantics, return types for each action, and references to the query_sql guard. With an output schema present, it still summarizes returns clearly, leaving no critical gap for correct invocation.

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 description coverage is 100%, so the schema already documents each parameter. The description reinforces action-specific parameter usage (e.g., action=save stores sql under name) and the relationship between name and id for delete/run, but it doesn't add significantly beyond the 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 states a specific verb+resource: a personal library of reusable SELECT queries, and distinguishes itself from siblings by contrasting with query_history's backward-looking log and query_sql's direct execution. It clearly conveys the four actions (save/run/list/delete) and the core value proposition of saving once and running by name.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It explicitly says 'instead of re-pasting SQL or scanning query_history's backward-looking log', naming two alternatives and implying when to use this tool. It also describes the intended pattern (save once, run by name) but does not fully enumerate exclusion conditions or other alternatives like suggest_queries, so a 4 is 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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