Font Design MCP

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project_create

Create a font project with Unicode UFO sources and technical glyphs, specifying metadata, metrics, and design rules for glyph validation.

Instructions

Create a project in the launch workspace with Unicode UFO sources and technical glyphs.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`brief`	No
`metrics`	No
`metadata`	Yes
`design_spec`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`ok`	Yes
`data`	No
`error`	No
`changed`	No
`summary`	Yes
`revision`	No
`warnings`	No
`project_id`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed15 schema fields changedv0.6.0Sep 12, 2026

addedInput schema / $defs / DesignRegion

Added value: +{
+  "additionalProperties": false,
+  "description": "A declared area in normalized visible bounds; useful for non-Latin and alternate anatomy.",
+  "properties": {
+    "bounds": {
+      "maxItems": 4,
+      "minItems": 4,
+      "prefixItems": [
+        {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        },
+        {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        },
+        {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        },
+        {
+          "maximum": 1,
+          "minimum": 0,
+          "type": "number"
+        }
+      ],
+      "type": "array"
+    },
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "location": {
+      "anyOf": [
+        {
+          "maxProperties": 4,
+          "patternProperties": {
+            "^[A-Za-z][A-Za-z0-9]{3}$": {
+              "maximum": 32767,
+              "minimum": -32768,
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "master_id": {
+      "anyOf": [
+        {
+          "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "minimum_samples": {
+      "default": 2,
+      "maximum": 17,
+      "minimum": 1,
+      "type": "integer"
+    },
+    "role": {
+      "enum": [
+        "stem",
+        "branch",
+        "junction",
+        "counter",
+        "curve",
+        "terminal"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "id",
+    "glyph_id",
+    "bounds",
+    "role"
+  ],
+  "type": "object"
+}

addedInput schema / $defs / DesignSpec / properties / glyph_origins

Added value: +{
+  "items": {
+    "$ref": "#/$defs/GlyphOrigin"
+  },
+  "maxItems": 512,
+  "type": "array"
+}

addedInput schema / $defs / DesignSpec / properties / regions

Added value: +{
+  "items": {
+    "$ref": "#/$defs/DesignRegion"
+  },
+  "maxItems": 512,
+  "type": "array"
+}

addedInput schema / $defs / DesignSpec / properties / stroke_profiles

Added value: +{
+  "items": {
+    "$ref": "#/$defs/StrokeProfile"
+  },
+  "maxItems": 512,
+  "type": "array"
+}

addedInput schema / $defs / DesignSpec / properties / usage_texts

Added value: +{
+  "items": {
+    "maxLength": 80,
+    "minLength": 2,
+    "type": "string"
+  },
+  "maxItems": 64,
+  "type": "array"
+}

addedInput schema / $defs / DesignSpec / properties / variation_probes

Added value: +{
+  "items": {
+    "$ref": "#/$defs/VariationProbe"
+  },
+  "maxItems": 32,
+  "type": "array"
+}

addedInput schema / $defs / DesignSpec / properties / variation_profiles

Added value: +{
+  "items": {
+    "$ref": "#/$defs/VariationProfile"
+  },
+  "maxItems": 128,
+  "type": "array"
+}

addedInput schema / $defs / GlyphOrigin

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "observation": {
+      "maxLength": 1000,
+      "minLength": 20,
+      "type": "string"
+    },
+    "reference_ids": {
+      "items": {
+        "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+        "type": "string"
+      },
+      "maxItems": 16,
+      "type": "array"
+    },
+    "status": {
+      "enum": [
+        "observed",
+        "extrapolated",
+        "original"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "glyph_id",
+    "status",
+    "observation"
+  ],
+  "type": "object"
+}

addedInput schema / $defs / MetricRule / properties / location

Added value: +{
+  "anyOf": [
+    {
+      "maxProperties": 4,
+      "patternProperties": {
+        "^[A-Za-z][A-Za-z0-9]{3}$": {
+          "maximum": 32767,
+          "minimum": -32768,
+          "type": "number"
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

addedInput schema / $defs / MetricRule / properties / master_id

Added value: +{
+  "anyOf": [
+    {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

addedInput schema / $defs / StrokeProbe / properties / location

Added value: +{
+  "anyOf": [
+    {
+      "maxProperties": 4,
+      "patternProperties": {
+        "^[A-Za-z][A-Za-z0-9]{3}$": {
+          "maximum": 32767,
+          "minimum": -32768,
+          "type": "number"
+        }
+      },
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

addedInput schema / $defs / StrokeProbe / properties / master_id

Added value: +{
+  "anyOf": [
+    {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

addedInput schema / $defs / StrokeProfile

Added value: +{
+  "additionalProperties": false,
+  "description": "Sample perpendicular to a centerline; measure ink or a bounded counter, in font units.",
+  "properties": {
+    "end": {
+      "maxItems": 2,
+      "minItems": 2,
+      "prefixItems": [
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        },
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        }
+      ],
+      "type": "array"
+    },
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "location": {
+      "anyOf": [
+        {
+          "maxProperties": 4,
+          "patternProperties": {
+            "^[A-Za-z][A-Za-z0-9]{3}$": {
+              "maximum": 32767,
+              "minimum": -32768,
+              "type": "number"
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "master_id": {
+      "anyOf": [
+        {
+          "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "max_ratio": {
+      "anyOf": [
+        {
+          "maximum": 100,
+          "minimum": 1,
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "maximum": {
+      "exclusiveMinimum": 0,
+      "maximum": 4000,
+      "type": "number"
+    },
+    "minimum": {
+      "exclusiveMinimum": 0,
+      "maximum": 4000,
+      "type": "number"
+    },
+    "region": {
+      "default": "ink",
+      "enum": [
+        "ink",
+        "counter"
+      ],
+      "type": "string"
+    },
+    "samples": {
+      "default": 5,
+      "maximum": 17,
+      "minimum": 2,
+      "type": "integer"
+    },
+    "start": {
+      "maxItems": 2,
+      "minItems": 2,
+      "prefixItems": [
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        },
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        }
+      ],
+      "type": "array"
+    }
+  },
+  "required": [
+    "id",
+    "glyph_id",
+    "start",
+    "end",
+    "minimum",
+    "maximum"
+  ],
+  "type": "object"
+}

addedInput schema / $defs / VariationProbe

Added value: +{
+  "additionalProperties": false,
+  "description": "Sample a declared stroke across an axis; this is not an optical weight estimate.",
+  "properties": {
+    "axis": {
+      "default": "horizontal",
+      "enum": [
+        "horizontal",
+        "vertical"
+      ],
+      "type": "string"
+    },
+    "axis_tag": {
+      "pattern": "^[A-Za-z][A-Za-z0-9]{3}$",
+      "type": "string"
+    },
+    "direction": {
+      "default": "nondecreasing",
+      "enum": [
+        "nondecreasing",
+        "nonincreasing"
+      ],
+      "type": "string"
+    },
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "location": {
+      "maxProperties": 4,
+      "patternProperties": {
+        "^[A-Za-z][A-Za-z0-9]{3}$": {
+          "maximum": 32767,
+          "minimum": -32768,
+          "type": "number"
+        }
+      },
+      "type": "object"
+    },
+    "minimum_change": {
+      "default": 0,
+      "maximum": 4000,
+      "minimum": 0,
+      "type": "number"
+    },
+    "position": {
+      "maximum": 16000,
+      "minimum": -16000,
+      "type": "number"
+    },
+    "span_index": {
+      "default": 0,
+      "maximum": 63,
+      "minimum": 0,
+      "type": "integer"
+    },
+    "tolerance": {
+      "default": 2,
+      "maximum": 1000,
+      "minimum": 0.5,
+      "type": "number"
+    },
+    "values": {
+      "items": {
+        "maximum": 32767,
+        "minimum": -32768,
+        "type": "number"
+      },
+      "maxItems": 9,
+      "minItems": 2,
+      "type": "array"
+    }
+  },
+  "required": [
+    "id",
+    "glyph_id",
+    "position",
+    "axis_tag",
+    "values"
+  ],
+  "type": "object"
+}

addedInput schema / $defs / VariationProfile

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "axis_tag": {
+      "pattern": "^[A-Za-z][A-Za-z0-9]{3}$",
+      "type": "string"
+    },
+    "direction": {
+      "default": "nondecreasing",
+      "enum": [
+        "nondecreasing",
+        "nonincreasing"
+      ],
+      "type": "string"
+    },
+    "end": {
+      "maxItems": 2,
+      "minItems": 2,
+      "prefixItems": [
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        },
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        }
+      ],
+      "type": "array"
+    },
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "location": {
+      "maxProperties": 4,
+      "patternProperties": {
+        "^[A-Za-z][A-Za-z0-9]{3}$": {
+          "maximum": 32767,
+          "minimum": -32768,
+          "type": "number"
+        }
+      },
+      "type": "object"
+    },
+    "master_id": {
+      "anyOf": [
+        {
+          "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "max_ratio": {
+      "anyOf": [
+        {
+          "maximum": 100,
+          "minimum": 1,
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "default": null
+    },
+    "maximum": {
+      "exclusiveMinimum": 0,
+      "maximum": 4000,
+      "type": "number"
+    },
+    "minimum": {
+      "exclusiveMinimum": 0,
+      "maximum": 4000,
+      "type": "number"
+    },
+    "minimum_change": {
+      "default": 0,
+      "maximum": 4000,
+      "minimum": 0,
+      "type": "number"
+    },
+    "region": {
+      "default": "ink",
+      "enum": [
+        "ink",
+        "counter"
+      ],
+      "type": "string"
+    },
+    "samples": {
+      "default": 5,
+      "maximum": 17,
+      "minimum": 2,
+      "type": "integer"
+    },
+    "start": {
+      "maxItems": 2,
+      "minItems": 2,
+      "prefixItems": [
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        },
+        {
+          "maximum": 16000,
+          "minimum": -16000,
+          "type": "number"
+        }
+      ],
+      "type": "array"
+    },
+    "tolerance": {
+      "default": 2,
+      "maximum": 1000,
+      "minimum": 0.5,
+      "type": "number"
+    },
+    "values": {
+      "items": {
+        "maximum": 32767,
+        "minimum": -32768,
+        "type": "number"
+      },
+      "maxItems": 9,
+      "minItems": 2,
+      "type": "array"
+    }
+  },
+  "required": [
+    "id",
+    "glyph_id",
+    "start",
+    "end",
+    "minimum",
+    "maximum",
+    "axis_tag",
+    "values"
+  ],
+  "type": "object"
+}

Changed4 schema fields changedv0.5.0Sep 10, 2026

addedInput schema / $defs / DesignSpec

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "digit_spacing": {
+      "default": "unspecified",
+      "enum": [
+        "unspecified",
+        "proportional",
+        "tabular"
+      ],
+      "type": "string"
+    },
+    "digit_tolerance": {
+      "default": 0.5,
+      "maximum": 100,
+      "minimum": 0,
+      "type": "number"
+    },
+    "metric_rules": {
+      "items": {
+        "$ref": "#/$defs/MetricRule"
+      },
+      "maxItems": 64,
+      "type": "array"
+    },
+    "notes": {
+      "default": "",
+      "maxLength": 4000,
+      "type": "string"
+    },
+    "protected_features": {
+      "default": "",
+      "maxLength": 4000,
+      "type": "string"
+    },
+    "reference_glyphs": {
+      "items": {
+        "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+        "type": "string"
+      },
+      "maxItems": 64,
+      "type": "array"
+    },
+    "required_characters": {
+      "default": "",
+      "maxLength": 4000,
+      "type": "string"
+    },
+    "stroke_probes": {
+      "items": {
+        "$ref": "#/$defs/StrokeProbe"
+      },
+      "maxItems": 128,
+      "type": "array"
+    },
+    "tangent_tolerance_degrees": {
+      "default": 3,
+      "exclusiveMinimum": 0,
+      "maximum": 30,
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

addedInput schema / $defs / MetricRule

Added value: +{
+  "additionalProperties": false,
+  "description": "Explicit equality targets, not inferred rules of beauty. All values are font units.",
+  "properties": {
+    "glyphs": {
+      "items": {
+        "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+        "type": "string"
+      },
+      "maxItems": 64,
+      "minItems": 1,
+      "type": "array"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "metric": {
+      "enum": [
+        "advance",
+        "visible_width",
+        "height",
+        "left_bearing",
+        "right_bearing"
+      ],
+      "type": "string"
+    },
+    "target": {
+      "maximum": 16000,
+      "minimum": -16000,
+      "type": "number"
+    },
+    "tolerance": {
+      "default": 1,
+      "maximum": 1000,
+      "minimum": 0,
+      "type": "number"
+    }
+  },
+  "required": [
+    "id",
+    "glyphs",
+    "metric",
+    "target"
+  ],
+  "type": "object"
+}

addedInput schema / $defs / StrokeProbe

Added value: +{
+  "additionalProperties": false,
+  "description": "Measure a filled interval on a declared scanline; choose away from junctions.",
+  "properties": {
+    "axis": {
+      "default": "horizontal",
+      "enum": [
+        "horizontal",
+        "vertical"
+      ],
+      "type": "string"
+    },
+    "glyph_id": {
+      "pattern": "^(?:\\.notdef|[a-zA-Z_][a-zA-Z0-9_.]{0,62})$",
+      "type": "string"
+    },
+    "id": {
+      "pattern": "^[a-zA-Z0-9_][a-zA-Z0-9_.-]{0,63}$",
+      "type": "string"
+    },
+    "position": {
+      "maximum": 16000,
+      "minimum": -16000,
+      "type": "number"
+    },
+    "span_index": {
+      "default": 0,
+      "maximum": 63,
+      "minimum": 0,
+      "type": "integer"
+    },
+    "target": {
+      "exclusiveMinimum": 0,
+      "maximum": 4000,
+      "type": "number"
+    },
+    "tolerance": {
+      "default": 2,
+      "maximum": 1000,
+      "minimum": 0.5,
+      "type": "number"
+    }
+  },
+  "required": [
+    "id",
+    "glyph_id",
+    "position",
+    "target"
+  ],
+  "type": "object"
+}

addedInput schema / properties / design_spec

Added value: +{
+  "anyOf": [
+    {
+      "$ref": "#/$defs/DesignSpec"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

Changed22 schema fields changedv0.4.3Sep 9, 2026
- removedInput schema / $defs / Metadata / properties / copyright / title
```
Removed value: -"Copyright"
```
- removedInput schema / $defs / Metadata / properties / family / title
```
Removed value: -"Family"
```
- removedInput schema / $defs / Metadata / properties / license_text / title
```
Removed value: -"License Text"
```
- removedInput schema / $defs / Metadata / properties / style / title
```
Removed value: -"Style"
```
- removedInput schema / $defs / Metadata / title
```
Removed value: -"Metadata"
```
- removedInput schema / $defs / Metrics / properties / ascender / title
```
Removed value: -"Ascender"
```
- removedInput schema / $defs / Metrics / properties / cap_height / title
```
Removed value: -"Cap Height"
```
- removedInput schema / $defs / Metrics / properties / descender / title
```
Removed value: -"Descender"
```
- removedInput schema / $defs / Metrics / properties / units_per_em / title
```
Removed value: -"Units Per Em"
```
- removedInput schema / $defs / Metrics / properties / x_height / title
```
Removed value: -"X Height"
```
- removedInput schema / $defs / Metrics / title
```
Removed value: -"Metrics"
```
- removedInput schema / properties / brief / title
```
Removed value: -"Brief"
```
- removedInput schema / title
```
Removed value: -"ProjectCreate"
```
- removedOutput schema / properties / changed / title
```
Removed value: -"Changed"
```
- removedOutput schema / properties / data / title
```
Removed value: -"Data"
```
- removedOutput schema / properties / error / title
```
Removed value: -"Error"
```
- removedOutput schema / properties / ok / title
```
Removed value: -"Ok"
```
- removedOutput schema / properties / project_id / title
```
Removed value: -"Project Id"
```
- removedOutput schema / properties / revision / title
```
Removed value: -"Revision"
```
- removedOutput schema / properties / summary / title
```
Removed value: -"Summary"
```
- removedOutput schema / properties / warnings / title
```
Removed value: -"Warnings"
```
- removedOutput schema / title
```
Removed value: -"Result"
```
First observedv0.1.0Sep 8, 2026

TDQS

C2.7/5.0

Behavior2/5

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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=false, so the safety profile is covered. The description adds essentially no behavioral context beyond those annotations — no side effects, permissions, or post-creation state are described.

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 single sentence is front-loaded with the verb and contains no filler. It is concise, though arguably too terse for the complexity of the tool.

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?

Given a required nested metadata object and a sprawling design_spec with many sub-definitions, the description is far too thin. The output schema exists so returns need not be explained, but the description does not help an agent populate the rich input structure.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Top-level schema description coverage is 0%, so the description must carry parameter meaning, but it only loosely gestures at 'UFO sources and technical glyphs.' It does not explain 'brief,' 'metrics,' 'metadata,' or the very complex 'design_spec,' leaving the agent to reverse-engineer the nested schema alone.

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 ('Create') and resource ('project') and adds scope ('in the launch workspace') plus content hints ('Unicode UFO sources and technical glyphs'). It is distinguishable from project_open and project_update by the verb, but it does not explicitly differentiate itself from siblings.

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?

There is no guidance on when to use this tool versus alternatives, no prerequisites, and no mention of when not to use it. The sentence describes the outcome but gives an agent no decision context beyond the bare verb.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.