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TinyFn

by io.tinyfn

random_color

Generate a random color.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
hexYes
rgbYes
rgb_stringYes

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed3 schema fields changed
    • addedOutput schema / $defs / RandomColorResponse
      Added value: +{
+  "properties": {
+    "hex": {
+      "title": "Hex",
+      "type": "string"
+    },
+    "rgb": {
+      "$ref": "#/$defs/RGBValues"
+    },
+    "rgb_string": {
+      "title": "Rgb String",
+      "type": "string"
+    }
+  },
+  "required": [
+    "hex",
+    "rgb",
+    "rgb_string"
+  ],
+  "title": "RandomColorResponse",
+  "type": "object"
+}
    • removedOutput schema / $defs / app__routers__color_utils__RandomColorResponse
      Removed value: -{
-  "properties": {
-    "hex": {
-      "title": "Hex",
-      "type": "string"
-    },
-    "rgb": {
-      "$ref": "#/$defs/RGBValues"
-    },
-    "rgb_string": {
-      "title": "Rgb String",
-      "type": "string"
-    }
-  },
-  "required": [
-    "hex",
-    "rgb",
-    "rgb_string"
-  ],
-  "title": "RandomColorResponse",
-  "type": "object"
-}
    • changedOutput schema / x-fastmcp-top-level-schema
      Previous value: -"app__routers__color_utils__RandomColorResponse"New value: +"RandomColorResponse"
  2. Changed3 schema fields changed
    • removedOutput schema / $defs / RandomColorResponse
      Removed value: -{
-  "properties": {
-    "hex": {
-      "title": "Hex",
-      "type": "string"
-    },
-    "rgb": {
-      "$ref": "#/$defs/RGBValues"
-    },
-    "rgb_string": {
-      "title": "Rgb String",
-      "type": "string"
-    }
-  },
-  "required": [
-    "hex",
-    "rgb",
-    "rgb_string"
-  ],
-  "title": "RandomColorResponse",
-  "type": "object"
-}
    • addedOutput schema / $defs / app__routers__color_utils__RandomColorResponse
      Added value: +{
+  "properties": {
+    "hex": {
+      "title": "Hex",
+      "type": "string"
+    },
+    "rgb": {
+      "$ref": "#/$defs/RGBValues"
+    },
+    "rgb_string": {
+      "title": "Rgb String",
+      "type": "string"
+    }
+  },
+  "required": [
+    "hex",
+    "rgb",
+    "rgb_string"
+  ],
+  "title": "RandomColorResponse",
+  "type": "object"
+}
    • changedOutput schema / x-fastmcp-top-level-schema
      Previous value: -"RandomColorResponse"New value: +"app__routers__color_utils__RandomColorResponse"
  3. Changed3 schema fields changed
    • addedOutput schema / $defs / RandomColorResponse
      Added value: +{
+  "properties": {
+    "hex": {
+      "title": "Hex",
+      "type": "string"
+    },
+    "rgb": {
+      "$ref": "#/$defs/RGBValues"
+    },
+    "rgb_string": {
+      "title": "Rgb String",
+      "type": "string"
+    }
+  },
+  "required": [
+    "hex",
+    "rgb",
+    "rgb_string"
+  ],
+  "title": "RandomColorResponse",
+  "type": "object"
+}
    • removedOutput schema / $defs / app__routers__color_utils__RandomColorResponse
      Removed value: -{
-  "properties": {
-    "hex": {
-      "title": "Hex",
-      "type": "string"
-    },
-    "rgb": {
-      "$ref": "#/$defs/RGBValues"
-    },
-    "rgb_string": {
-      "title": "Rgb String",
-      "type": "string"
-    }
-  },
-  "required": [
-    "hex",
-    "rgb",
-    "rgb_string"
-  ],
-  "title": "RandomColorResponse",
-  "type": "object"
-}
    • changedOutput schema / x-fastmcp-top-level-schema
      Previous value: -"app__routers__color_utils__RandomColorResponse"New value: +"RandomColorResponse"
  4. Changed3 schema fields changed
    • removedOutput schema / $defs / RandomColorResponse
      Removed value: -{
-  "properties": {
-    "hex": {
-      "title": "Hex",
-      "type": "string"
-    },
-    "rgb": {
-      "$ref": "#/$defs/RGBValues"
-    },
-    "rgb_string": {
-      "title": "Rgb String",
-      "type": "string"
-    }
-  },
-  "required": [
-    "hex",
-    "rgb",
-    "rgb_string"
-  ],
-  "title": "RandomColorResponse",
-  "type": "object"
-}
    • addedOutput schema / $defs / app__routers__color_utils__RandomColorResponse
      Added value: +{
+  "properties": {
+    "hex": {
+      "title": "Hex",
+      "type": "string"
+    },
+    "rgb": {
+      "$ref": "#/$defs/RGBValues"
+    },
+    "rgb_string": {
+      "title": "Rgb String",
+      "type": "string"
+    }
+  },
+  "required": [
+    "hex",
+    "rgb",
+    "rgb_string"
+  ],
+  "title": "RandomColorResponse",
+  "type": "object"
+}
    • changedOutput schema / x-fastmcp-top-level-schema
      Previous value: -"RandomColorResponse"New value: +"app__routers__color_utils__RandomColorResponse"
  5. Changed3 schema fields changed
    • addedOutput schema / $defs / RandomColorResponse
      Added value: +{
+  "properties": {
+    "hex": {
+      "title": "Hex",
+      "type": "string"
+    },
+    "rgb": {
+      "$ref": "#/$defs/RGBValues"
+    },
+    "rgb_string": {
+      "title": "Rgb String",
+      "type": "string"
+    }
+  },
+  "required": [
+    "hex",
+    "rgb",
+    "rgb_string"
+  ],
+  "title": "RandomColorResponse",
+  "type": "object"
+}
    • removedOutput schema / $defs / app__routers__color_utils__RandomColorResponse
      Removed value: -{
-  "properties": {
-    "hex": {
-      "title": "Hex",
-      "type": "string"
-    },
-    "rgb": {
-      "$ref": "#/$defs/RGBValues"
-    },
-    "rgb_string": {
-      "title": "Rgb String",
-      "type": "string"
-    }
-  },
-  "required": [
-    "hex",
-    "rgb",
-    "rgb_string"
-  ],
-  "title": "RandomColorResponse",
-  "type": "object"
-}
    • changedOutput schema / x-fastmcp-top-level-schema
      Previous value: -"app__routers__color_utils__RandomColorResponse"New value: +"RandomColorResponse"
  6. First observed

TDQS

A3.5/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does disclose the essential behavior: generating a random color with no side effects or inputs. However, it does not mention details such as the color format or distribution, though the presence of an output schema partially mitigates this.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence with no filler words. It immediately states the operation and resource, earning every word.

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?

For a zero-parameter tool with an output schema, the description is largely sufficient for invocation. The main gap is the lack of differentiation among the many color-related sibling tools, but the output schema can cover the return format, so the core information needed to call the tool correctly is present.

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?

The tool has zero parameters and 100% schema description coverage, so there is no parameter information to add. The description is not required to explain parameters that do not exist, making this adequate.

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 states a specific verb and resource: 'Generate a random color.' It is clear about the core operation, but it does not distinguish itself from closely related siblings such as random_color_2, generate_color, or random_hex, which could create ambiguity for an agent selecting among them.

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 about when to use this tool versus alternatives like random_color_2, generate_color, or random_hex. The description simply states what it does, leaving the agent to infer the appropriate context without any exclusions or comparisons.

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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TDQS

C2.3/5.0
Disambiguation2/5

Many tools have overlapping purposes, such as multiple random generators (random_integer, random_number), duplicate hashing functions (hash_md5, md5_checksum), and near-identical tools (compare, compare_2, compare_decimals). The sheer number of tools and lack of clear boundaries make it difficult for an agent to differentiate.

Naming Consistency1/5

Naming is highly inconsistent. There are duplicate tools with different names (camel_case vs to_camel_case, slug vs slugify), arbitrary suffixes like '_2', and mixing of patterns (e.g., generate_password vs password_entropy). No clear convention is followed.

Tool Count1/5

With 572 tools, the server is massively overpopulated for any coherent purpose. It includes trivial endpoints (true_endpoint, null, hello_world) and numerous duplicates, far exceeding a well-scoped utility set.

Completeness2/5

While the server covers many domains (math, strings, dates, colors, etc.), the presence of duplicate and trivial tools indicates a lack of thoughtful curation. There are gaps in basic operations (e.g., no dedicated file or network tools), and many tools are redundant.

Resources