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Craft Quantities: construction material calculators

Create a My Project file from a house

create_project_file_from_house
Read-onlyIdempotent

Creates one My Project backup file from a House Estimator form: the house's lines, and its drawing, which the site's canvas reopens. The reader restores the file on craftquantities.com as a new project. Nothing is stored or sent; no prices.

Input Schema

NameRequiredDescriptionDefault
nameNoThe new project's name.
detailNofull (the default): the whole answer. summary: the result lines, the citation line and the page only — fewer tokens to read.full
housesYesThe House Estimator form (one house; two give their lines without a drawing).
systemNoThe unit system inputs left out open in, and the one the page link opens in. The answer comes in both.metric

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / anyOf
      Previous value: -[
      -  {
      -    "properties": {
      -      "drawing": {
      -        "properties": {
      -          "carried": {
      -            "type": "boolean"
      -          },
      -          "note": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "carried"
      -        ],
      -        "type": "object"
      -      },
      -      "engine": {
      -        "type": "object"
      -      },
      -      "file": {
      -        "properties": {
      -          "content": {
      -            "properties": {
      -              "exportedAt": {
      -                "type": "string"
      -              },
      -              "magic": {
      -                "const": "craftquantities.backup"
      -              },
      -              "stores": {
      -                "type": "object"
      -              },
      -              "v": {
      -                "type": "integer"
      -              }
      -            },
      -            "required": [
      -              "magic",
      -              "v",
      -              "exportedAt",
      -              "stores"
      -            ],
      -            "type": "object"
      -          },
      -          "filename": {
      -            "type": "string"
      -          },
      -          "mediaType": {
      -            "const": "application/json"
      -          }
      -        },
      -        "required": [
      -          "filename",
      -          "mediaType",
      -          "content"
      -        ],
      -        "type": "object"
      -      },
      -      "howToImport": {
      -        "type": "string"
      -      },
      -      "licence": {
      -        "properties": {
      -          "attribution": {
      -            "type": "string"
      -          },
      -          "name": {
      -            "type": "string"
      -          },
      -          "url": {
      -            "type": "string"
      -          }
      -        },
      -        "required": [
      -          "name",
      -          "url",
      -          "attribution"
      -        ],
      -        "type": "object"
      -      },
      -      "notice": {
      -        "type": "string"
      -      },
      -      "project": {
      -        "properties": {
      -          "lines": {
      -            "items": {
      -              "required": [
      -                "label",
      -                "quantity",
      -                "unit",
      -                "from"
      -              ],
      -              "type": "object"
      -            },
      -            "type": "array"
      -          },
      -          "name": {
      -            "type": "string"
      -          },
      -          "system": {
      -            "enum": [
      -              "metric",
      -              "imperial"
      -            ]
      -          }
      -        },
      -        "required": [
      -          "name",
      -          "system",
      -          "lines"
      -        ],
      -        "type": "object"
      -      }
      -    },
      -    "required": [
      -      "engine",
      -      "file",
      -      "project",
      -      "howToImport",
      -      "licence",
      -      "notice"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "properties": {
      -      "citation": {
      -        "description": "The one citation line, built from the answer's own data.",
      -        "type": "string"
      -      },
      -      "detail": {
      -        "const": "summary"
      -      },
      -      "lines": {
      -        "description": "The result lines, as the report's table gives them.",
      -        "items": {
      -          "additionalProperties": {
      -            "type": "string"
      -          },
      -          "type": "object"
      -        },
      -        "type": "array"
      -      },
      -      "more": {
      -        "anyOf": [
      -          {
      -            "type": "string"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "notes": {
      -        "description": "What a professional must decide, when to call one, a false-friend warning, that adoption is local: kept in every summary.",
      -        "items": {
      -          "type": "string"
      -        },
      -        "type": "array"
      -      },
      -      "open": {
      -        "anyOf": [
      -          {
      -            "type": "string"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      },
      -      "title": {
      -        "type": "string"
      -      },
      -      "tool": {
      -        "type": "string"
      -      },
      -      "url": {
      -        "anyOf": [
      -          {
      -            "type": "string"
      -          },
      -          {
      -            "type": "null"
      -          }
      -        ]
      -      }
      -    },
      -    "required": [
      -      "detail",
      -      "tool",
      -      "title",
      -      "lines",
      -      "notes",
      -      "citation",
      -      "url",
      -      "open",
      -      "more"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "properties": {
      +      "drawing": {
      +        "properties": {
      +          "carried": {
      +            "type": "boolean"
      +          },
      +          "note": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "carried"
      +        ],
      +        "type": "object"
      +      },
      +      "engine": {
      +        "type": "object"
      +      },
      +      "file": {
      +        "properties": {
      +          "content": {
      +            "properties": {
      +              "exportedAt": {
      +                "type": "string"
      +              },
      +              "magic": {
      +                "const": "craftquantities.backup"
      +              },
      +              "stores": {
      +                "type": "object"
      +              },
      +              "v": {
      +                "type": "integer"
      +              }
      +            },
      +            "required": [
      +              "magic",
      +              "v",
      +              "exportedAt",
      +              "stores"
      +            ],
      +            "type": "object"
      +          },
      +          "filename": {
      +            "type": "string"
      +          },
      +          "mediaType": {
      +            "const": "application/json"
      +          }
      +        },
      +        "required": [
      +          "filename",
      +          "mediaType",
      +          "content"
      +        ],
      +        "type": "object"
      +      },
      +      "howToImport": {
      +        "type": "string"
      +      },
      +      "licence": {
      +        "properties": {
      +          "attribution": {
      +            "type": "string"
      +          },
      +          "name": {
      +            "type": "string"
      +          },
      +          "url": {
      +            "type": "string"
      +          }
      +        },
      +        "required": [
      +          "name",
      +          "url",
      +          "attribution"
      +        ],
      +        "type": "object"
      +      },
      +      "notice": {
      +        "type": "string"
      +      },
      +      "project": {
      +        "properties": {
      +          "lines": {
      +            "items": {
      +              "required": [
      +                "label",
      +                "quantity",
      +                "unit",
      +                "from"
      +              ],
      +              "type": "object"
      +            },
      +            "type": "array"
      +          },
      +          "name": {
      +            "type": "string"
      +          },
      +          "system": {
      +            "enum": [
      +              "metric",
      +              "imperial"
      +            ]
      +          }
      +        },
      +        "required": [
      +          "name",
      +          "system",
      +          "lines"
      +        ],
      +        "type": "object"
      +      },
      +      "state": {
      +        "properties": {
      +          "characters": {
      +            "type": "integer"
      +          },
      +          "format": {
      +            "description": "The token's format and version.",
      +            "type": "string"
      +          },
      +          "link": {
      +            "description": "Opens the project on the site from the token, carried in the address fragment, which a browser does not send to any server.",
      +            "type": "string"
      +          },
      +          "note": {
      +            "type": "string"
      +          },
      +          "token": {
      +            "anyOf": [
      +              {
      +                "description": "The project's inputs, deflated and base64url-encoded with a format version and a CRC-32 check (cqp1.…). Compact, not encrypted: anyone who has it can read it.",
      +                "type": "string"
      +              },
      +              {
      +                "type": "null"
      +              }
      +            ]
      +          }
      +        },
      +        "required": [
      +          "token",
      +          "format",
      +          "note"
      +        ],
      +        "type": "object"
      +      }
      +    },
      +    "required": [
      +      "engine",
      +      "file",
      +      "project",
      +      "howToImport",
      +      "licence",
      +      "notice"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "properties": {
      +      "citation": {
      +        "description": "The one citation line, built from the answer's own data.",
      +        "type": "string"
      +      },
      +      "detail": {
      +        "const": "summary"
      +      },
      +      "lines": {
      +        "description": "The result lines, as the report's table gives them.",
      +        "items": {
      +          "additionalProperties": {
      +            "type": "string"
      +          },
      +          "type": "object"
      +        },
      +        "type": "array"
      +      },
      +      "more": {
      +        "anyOf": [
      +          {
      +            "type": "string"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "notes": {
      +        "description": "What a professional must decide, when to call one, a false-friend warning, that adoption is local: kept in every summary.",
      +        "items": {
      +          "type": "string"
      +        },
      +        "type": "array"
      +      },
      +      "open": {
      +        "anyOf": [
      +          {
      +            "type": "string"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      },
      +      "title": {
      +        "type": "string"
      +      },
      +      "tool": {
      +        "type": "string"
      +      },
      +      "url": {
      +        "anyOf": [
      +          {
      +            "type": "string"
      +          },
      +          {
      +            "type": "null"
      +          }
      +        ]
      +      }
      +    },
      +    "required": [
      +      "detail",
      +      "tool",
      +      "title",
      +      "lines",
      +      "notes",
      +      "citation",
      +      "url",
      +      "open",
      +      "more"
      +    ],
      +    "type": "object"
      +  }
      +]
  2. Added

TDQS

A3.7/5.0
Behavior4/5

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

Annotations already declare readOnly, idempotent and non-destructive, and the description reinforces this with 'Nothing is stored or sent; no prices' and explains the downstream flow ('the reader restores the file on craftquantities.com'). That adds genuine behavioral context beyond the annotations, though it does not spell out output/size limits.

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?

Three short sentences with the core action front-loaded and no filler. The trailing 'no prices' fragment is slightly telegraphic but not wasteful.

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?

An output schema exists, so return format need not be described, and the description covers the transformation, its provenance and its lack of side effects. It could say more about the two-house case (lines without drawing) or unit behavior, but nothing critical is missing.

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 name, detail, houses and system. The description adds only high-level framing ('the house's lines, and its drawing') and does not clarify any individual parameter, so the baseline 3 applies.

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?

States a specific verb and resource ('Creates one My Project backup file') plus the exact input source ('from a House Estimator form'), which implicitly separates it from the from_plan/from_drawing/from_calculations siblings. It is clear without being an explicit side-by-side differentiation.

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

Usage Guidelines3/5

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

Usage is only implied by the source ('from a House Estimator form'). It never states when to prefer this over create_project_file_from_calculations or the other create_project_file_* siblings, nor any prerequisites or exclusions.

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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