Narracore Screenplay Formatter

Fountain ⇄ blocks converter

convert_fountain

Convert between Narracore screenplay blocks and Fountain (the plain-text screenplay interchange format). direction="to_fountain": screenplay (input_format="text" or "blocks") → Fountain text (Latin content upper-cased per convention, CJK preserved verbatim; notes as [[…]]). direction="from_fountain": Fountain text → typed blocks you can pass straight to format_screenplay (input_format="blocks") — supports scene headings (INT/EXT/EST/I/E), character cues with (V.O.)-style extensions (extension becomes the delivery hint), parentheticals, dialogue, TO: transitions, > forced transitions, . forced action, [[notes]]; boneyard /…/ is stripped and reported, title-page keys and # section headers are skipped with warnings; mostly-Chinese content falls back to the Chinese screenplay parser (Fountain rules target Latin scripts). One credit covers one screenplay for 24 hours across the screenplay tools — converting and then formatting the same screenplay charges once. Failed calls are never charged. 剧本块与 Fountain 格式互转；同一份剧本 24 小时内多工具只扣一次。

Input Schema

Name	Required	Description
`text`	No	to_fountain only: raw screenplay text (input_format="text")
`blocks`	No	to_fountain only: typed blocks (input_format="blocks")
`fountain`	No	from_fountain only: the Fountain source text
`direction`	No	Required, one of to_fountain \| from_fountain: to_fountain = screenplay → Fountain text; from_fountain = Fountain text → typed blocks.
`request_id`	No	Idempotency key (optional)
`license_key`	No	License key NRC-XXXX-XXXX-XXXX-XXXX (optional — free daily quota works without one)
`input_format`	No	to_fountain only: screenplay source format

Output Schema

Name	Required	Description	Default
`ok`	Yes
`tool`	No
`state`	No
`stats`	No
`blocks`	No
`reason`	No
`credits`	No
`message`	No
`fountain`	No
`recovery`	No
`warnings`	No
`conflicts`	No
`direction`	No
`next_step`	No
`request_id`	No
`diagnostics`	No
`next_actions`	No
`contract_version`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 11, 2026

changedInput schema / properties / direction / description

Previous value: -"to_fountain: screenplay → Fountain text. from_fountain: Fountain text → typed blocks."New value: +"Required, one of to_fountain | from_fountain: to_fountain = screenplay → Fountain text; from_fountain = Fountain text → typed blocks."

removedInput schema / properties / direction / enum

Removed value: -[
-  "to_fountain",
-  "from_fountain"
-]

removedInput schema / required
```
Removed value: -[
-  "direction"
-]
```

Changed1 schema field changedOct 5, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "blocks": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "delivery": {
+            "type": "string"
+          },
+          "id": {
+            "type": "string"
+          },
+          "location": {
+            "type": "string"
+          },
+          "scene_number": {
+            "type": "string"
+          },
+          "speaker": {
+            "type": "string"
+          },
+          "text": {
+            "type": "string"
+          },
+          "time_of_day": {
+            "type": "string"
+          },
+          "type": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "type"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "conflicts": {},
+    "contract_version": {
+      "type": "string"
+    },
+    "credits": {
+      "additionalProperties": {},
+      "properties": {
+        "bundled": {
+          "type": "boolean"
+        },
+        "charged": {
+          "type": "number"
+        },
+        "free_tier_used": {
+          "type": "boolean"
+        },
+        "note": {
+          "type": "string"
+        },
+        "remaining": {
+          "type": [
+            "number",
+            "null"
+          ]
+        }
+      },
+      "required": [
+        "charged",
+        "remaining"
+      ],
+      "type": "object"
+    },
+    "diagnostics": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "block_id": {
+            "type": "string"
+          },
+          "code": {
+            "type": "string"
+          },
+          "line": {
+            "type": "number"
+          },
+          "message": {
+            "type": "string"
+          },
+          "severity": {
+            "type": "string"
+          },
+          "suggested_action": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "severity",
+          "message"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "direction": {
+      "type": "string"
+    },
+    "fountain": {
+      "type": "string"
+    },
+    "message": {
+      "type": "string"
+    },
+    "next_actions": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "billing": {
+            "enum": [
+              "free",
+              "bundled",
+              "charged"
+            ],
+            "type": "string"
+          },
+          "purpose": {
+            "type": "string"
+          },
+          "requires": {
+            "type": "string"
+          },
+          "reuse_fields": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "tool": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "tool",
+          "purpose",
+          "requires",
+          "billing",
+          "reuse_fields"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "ok": {
+      "type": "boolean"
+    },
+    "reason": {
+      "type": "string"
+    },
+    "recovery": {
+      "additionalProperties": false,
+      "properties": {
+        "action": {
+          "type": "string"
+        },
+        "field_path": {
+          "type": "string"
+        },
+        "keep_request_id": {
+          "type": "boolean"
+        },
+        "note": {
+          "type": "string"
+        },
+        "resets_at_utc": {
+          "type": "string"
+        },
+        "retry_after_ms": {
+          "type": "number"
+        },
+        "retryable": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "action",
+        "retryable",
+        "keep_request_id"
+      ],
+      "type": "object"
+    },
+    "request_id": {
+      "type": "string"
+    },
+    "state": {},
+    "stats": {},
+    "tool": {
+      "const": "convert_fountain",
+      "type": "string"
+    },
+    "warnings": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "ok"
+  ],
+  "type": "object"
+}

Changed1 schema field changedSep 19, 2026
- addedInput schema / properties / blocks / items / properties / text / maxLength
```
Added value: +200000
```
AddedSep 16, 2026

TDQS

A4.6/5.0

Behavior5/5

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

Goes well beyond the annotations by disclosing transformation side effects (Latin upper-casing, CJK preserved verbatim, notes as [[…]]), lossy/ignored input (boneyard stripped and reported, title-page keys and # headers skipped with warnings), a Chinese-content parser fallback, and the unusual billing model (one credit per screenplay per 24h, failed calls never charged). This is exactly the kind of behavior an agent cannot infer from readOnlyHint/destructiveHint.

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?

Dense but front-loaded, with purpose stated first and per-direction behavior clustered afterward. The trailing Chinese restatement duplicates the English content, costing a little space without adding information.

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?

With an output schema present, return values need not be explained; the description covers direction semantics, parsing caveats, fallbacks, and billing, leaving no obvious gap for correct invocation.

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

Parameters4/5

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

Schema coverage is 100%, so the baseline is 3, but the description adds coupling semantics the schema does not convey — that direction determines which of text/blocks/fountain is meaningful and what each direction emits. Useful marginal value over the structured fields.

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?

States a specific bidirectional transformation between Narracore screenplay blocks and Fountain text, naming both the resource and both directions. An agent can distinguish it immediately from siblings like format_screenplay or analyze_screenplay.

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?

Explicitly defines the two direction values and the condition that selects each, and points to the downstream consumer (pass blocks straight to format_screenplay with input_format="blocks"). There is no explicit when-not-to-use or sibling comparison, so it stops short of a 5.

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

All Narracore Screenplay Formatter tools Inspect

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