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LookupNinjaScriptSymbol

Resolves one symbol against the live NinjaScript runtime: namespace, members, and overload list. The most useful repair tool when compile fails on an unknown identifier.

PropertyValue
Required scopemcp:read
RiskNone. Read-only.
Side effectsNone.

When an agent should use it​

  • After a CompileNinjaScript failure that references a missing or ambiguous symbol.
  • When choosing among method overloads before writing code.

Parameters​

{ "name": "EMA" }

Response shape​

{
  "name": "EMA",
  "kind": "indicator",
  "namespace": "NinjaTrader.NinjaScript.Indicators",
  "members": [
    {"signature": "EMA(int period)"},
    {"signature": "EMA(ISeries<double> input, int period)"}
  ]
}

Example user prompt​

The compile failed on a call to ATR. Look up ATR and tell me the overloads
available. Pick the one that matches what we have and rewrite the line.

Common errors​

SymptomLikely causeFix
not_foundThe symbol does not exist or is not loaded.Use SearchNinjaScriptSymbols to find similar names.

Use in AI-generated NinjaScript workflows​

  • When the agent should call it: for every unresolved identifier in a compile failure, and before generating code that references an ambiguous overload.
  • Required scope: mcp:read.
  • Confirmation required: no.
  • What the agent should summarize: the chosen overload's exact signature and the rationale, plus any rejected alternatives.
  • Failure mode it helps catch: the most common compile failure pattern in AI-generated NinjaScript: wrong overload, removed method, hallucinated namespace.

For the broader vibe coding workflow, see NinjaScript AI Workflow.