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OnlineCyberTools MCP (280+ filterable tools)

by Jambozx
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JavaScript
Remote

webdev_typescript_playground

Read-onlyIdempotent

Transpile TypeScript to JavaScript by stripping type annotations and type-only imports/exports, with optional ES5 downleveling. Also runs lightweight type checks for common errors.

Instructions

TypeScript Playground (transpile to JavaScript). Transpile TypeScript source to JavaScript by regex stripping of type annotations, interfaces, and type-only imports/exports, with optional ES5 downleveling (const/let to var, arrow functions, template literals); also runs a lightweight type check that flags uninitialized const, type-mismatch assignments, and implicit-any parameters. Use it to preview compiled output and catch obvious type errors; use webdev_json_to_typescript instead to derive interfaces from JSON, or webdev_javascript_beautifier to reformat plain JS. Does not execute the code — pure string transformation that runs locally, read-only, non-destructive, contacts no external service, and is rate-limited. Returns the compiled JavaScript, detected diagnostics, extracted type symbols, and a success flag.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
codeYesTypeScript source to transpile (alias: typescript). Must be non-empty.
targetNoECMAScript target. Only "ES5" triggers downleveling (const/let to var, arrows to functions, template literals to concatenation); any other value emits as-is.ES2017
moduleNoModule system label echoed back in compilerOptions; does not alter output.CommonJS
strictNoStrict-mode flag echoed back in compilerOptions; does not change checks.
noImplicitAnyNoWhen true, flags function parameters with no type annotation as implicit-any diagnostics.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
compiledJsNoThe transpiled JavaScript output.
errorsNoDetected type/syntax diagnostics; empty when none.
typeInfoNoExtracted typed symbols (variables and functions).
successNoTrue when no diagnostics were found (errors is empty).
compilerOptionsNoThe normalized options actually applied.

Schema Changelog

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

  1. Changed14 schema fields changedv0.5.1
    • addedInput schema / additionalProperties
      Added value: +false
    • addedInput schema / properties / code / description
      Added value: +"TypeScript source to transpile (alias: typescript). Must be non-empty."
    • addedInput schema / properties / code / examples
      Added value: +[
+  "const greeting: string = \"hi\";"
+]
    • addedInput schema / properties / module / default
      Added value: +"CommonJS"
    • addedInput schema / properties / module / description
      Added value: +"Module system label echoed back in compilerOptions; does not alter output."
    • addedInput schema / properties / noImplicitAny / default
      Added value: +true
    • addedInput schema / properties / noImplicitAny / description
      Added value: +"When true, flags function parameters with no type annotation as implicit-any diagnostics."
    • addedInput schema / properties / strict / default
      Added value: +true
    • addedInput schema / properties / strict / description
      Added value: +"Strict-mode flag echoed back in compilerOptions; does not change checks."
    • addedInput schema / properties / target / default
      Added value: +"ES2017"
    • addedInput schema / properties / target / description
      Added value: +"ECMAScript target. Only \"ES5\" triggers downleveling (const/let to var, arrows to functions, template literals to concatenation); any other value emits as-is."
    • addedInput schema / properties / target / examples
      Added value: +[
+  "ES5",
+  "ES2017"
+]
    • changedInput schema / required
      Previous value: -[
-  "code",
-  "target",
-  "module",
-  "strict",
-  "noImplicitAny"
-]New value: +[
+  "code"
+]
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "compiledJs": {
+      "description": "The transpiled JavaScript output.",
+      "type": "string"
+    },
+    "compilerOptions": {
+      "description": "The normalized options actually applied.",
+      "properties": {
+        "module": {
+          "description": "Resolved module system label.",
+          "type": "string"
+        },
+        "noImplicitAny": {
+          "description": "Resolved implicit-any flag.",
+          "type": "boolean"
+        },
+        "strict": {
+          "description": "Resolved strict flag.",
+          "type": "boolean"
+        },
+        "target": {
+          "description": "Resolved ECMAScript target.",
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
+    "errors": {
+      "description": "Detected type/syntax diagnostics; empty when none.",
+      "items": {
+        "properties": {
+          "id": {
+            "description": "Zero-based index of the diagnostic.",
+            "type": "integer"
+          },
+          "line": {
+            "description": "1-based source line number.",
+            "type": "integer"
+          },
+          "message": {
+            "description": "Human-readable diagnostic message.",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "success": {
+      "description": "True when no diagnostics were found (errors is empty).",
+      "type": "boolean"
+    },
+    "typeInfo": {
+      "description": "Extracted typed symbols (variables and functions).",
+      "items": {
+        "properties": {
+          "id": {
+            "description": "Zero-based index of the symbol.",
+            "type": "integer"
+          },
+          "symbol": {
+            "description": "Declared identifier name.",
+            "type": "string"
+          },
+          "type": {
+            "description": "Declared type, or function for function declarations.",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}
  2. First observedv0.1.0

TDQS

A4.6/5.0
Behavior5/5

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

Describes local execution, read-only, non-destructive, no external service, rate-limited, and specifics of type checks, adding context beyond annotations.

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?

Multiple sentences, each serving a purpose (transformation, type check, usage guidance, limitations), with no redundancy, though slightly long.

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?

Covers transformation, type checking, limitations, alternatives, and behavioral traits; output schema exists so return values not needed.

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 coverage is 100% with detailed descriptions, so description adds little new param info; it provides context like 'optional ES5 downleveling' but doesn't enhance semantics beyond schema.

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?

The description clearly states it transpiles TypeScript to JavaScript via regex stripping, and explicitly distinguishes from siblings like webdev_json_to_typescript and webdev_javascript_beautifier.

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

Usage Guidelines5/5

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

Provides explicit when-to-use (preview compiled output, catch type errors) and when-not (does not execute code), and names specific alternatives.

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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