TinyFn

in_range

Check if a value is within a range.

Input Schema

Name	Required	Description
`value`	Yes	Value to check
`max_val`	Yes	Maximum value
`min_val`	Yes	Minimum value

Output Schema

Name	Required	Description	Default
`max`	Yes
`min`	Yes
`value`	Yes
`in_range`	Yes
`distance_from_max`	Yes
`distance_from_min`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 23, 2026

removedOutput schema / $defs / RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"RangeResponse"New value: +"app__routers__misc_utils__RangeResponse"

Changed3 schema fields changedAug 29, 2026

addedOutput schema / $defs / RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__misc_utils__RangeResponse"New value: +"RangeResponse"

Changed3 schema fields changedAug 29, 2026

removedOutput schema / $defs / RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"RangeResponse"New value: +"app__routers__misc_utils__RangeResponse"

Changed3 schema fields changedJul 27, 2026

addedOutput schema / $defs / RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__misc_utils__RangeResponse"New value: +"RangeResponse"

Changed3 schema fields changedJul 27, 2026

removedOutput schema / $defs / RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

addedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"RangeResponse"New value: +"app__routers__misc_utils__RangeResponse"

Changed3 schema fields changedJul 20, 2026

addedOutput schema / $defs / RangeResponse

Added value: +{
+  "properties": {
+    "distance_from_max": {
+      "title": "Distance From Max",
+      "type": "number"
+    },
+    "distance_from_min": {
+      "title": "Distance From Min",
+      "type": "number"
+    },
+    "in_range": {
+      "title": "In Range",
+      "type": "boolean"
+    },
+    "max": {
+      "title": "Max",
+      "type": "number"
+    },
+    "min": {
+      "title": "Min",
+      "type": "number"
+    },
+    "value": {
+      "title": "Value",
+      "type": "number"
+    }
+  },
+  "required": [
+    "value",
+    "min",
+    "max",
+    "in_range",
+    "distance_from_min",
+    "distance_from_max"
+  ],
+  "title": "RangeResponse",
+  "type": "object"
+}

removedOutput schema / $defs / app__routers__misc_utils__RangeResponse

Removed value: -{
-  "properties": {
-    "distance_from_max": {
-      "title": "Distance From Max",
-      "type": "number"
-    },
-    "distance_from_min": {
-      "title": "Distance From Min",
-      "type": "number"
-    },
-    "in_range": {
-      "title": "In Range",
-      "type": "boolean"
-    },
-    "max": {
-      "title": "Max",
-      "type": "number"
-    },
-    "min": {
-      "title": "Min",
-      "type": "number"
-    },
-    "value": {
-      "title": "Value",
-      "type": "number"
-    }
-  },
-  "required": [
-    "value",
-    "min",
-    "max",
-    "in_range",
-    "distance_from_min",
-    "distance_from_max"
-  ],
-  "title": "RangeResponse",
-  "type": "object"
-}

changedOutput schema / x-fastmcp-top-level-schema

Previous value: -"app__routers__misc_utils__RangeResponse"New value: +"RangeResponse"

First observedJun 27, 2026

TDQS

C2.8/5.0

Behavior2/5

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

With no annotations, the description must fully disclose behavior. It fails to specify whether the range check is inclusive (value >= min && value <= max) or exclusive (value > min && value < max). No edge cases are mentioned.

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 single sentence with no fluff. However, it could be longer to include necessary behavioral details, so not a 5.

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

Completeness3/5

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

For a simple range check with an output schema (presumably boolean), the description is adequate but lacks specification on inclusivity and edge cases, which are important for correct usage.

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?

The schema has 100% coverage with basic descriptions, but the tool description adds no additional meaning beyond what is already in the schema (e.g., 'Value to check'). It does not clarify inclusivity for min and max.

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?

The description clearly states the action ('Check if a value is within a range'), which is a specific verb+resource. However, sibling tools like 'is_between' likely perform the same check, so it lacks differentiation.

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?

No guidance is provided on when to use this tool versus alternatives like 'is_between' or 'clamp'. The description does not mention context 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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in_range

Input Schema

Output Schema

Schema Changelog

TDQS

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