Document the return value of every tooling builder

src/interface/IIntegrityToolingV1.sol

@@ -19,5 +19,7 @@ interface IIntegrityToolingV1 {
     /// Declared `view` so an implementation may read storage or an immutable to
     /// build its answer. A `pure` implementation still conforms, as an override
     /// may only tighten mutability.
+    /// @return Every two bytes is a function pointer for an integrity check,
+    /// positionally indexed by opcode.
     function buildIntegrityFunctionPointers() external view returns (bytes memory);
 }

src/interface/IOpcodeToolingV1.sol

@@ -18,5 +18,7 @@ interface IOpcodeToolingV1 {
     /// Declared `view` so an implementation may read storage or an immutable to
     /// build its answer. A `pure` implementation still conforms, as an override
     /// may only tighten mutability.
+    /// @return Every two bytes is a function pointer for an opcode
+    /// implementation, positionally indexed by opcode.
     function buildOpcodeFunctionPointers() external view returns (bytes memory);
 }

src/interface/IParserToolingV1.sol

@@ -18,6 +18,8 @@ interface IParserToolingV1 {
     /// Declared `view` so an implementation may read storage or an immutable to
     /// build its answer. A `pure` implementation still conforms, as an override
     /// may only tighten mutability.
+    /// @return Every two bytes is a function pointer for an operand handler,
+    /// positionally indexed to match the parse meta.
     function buildOperandHandlerFunctionPointers() external view returns (bytes memory);
 
     /// Builds literal parser function pointers.
@@ -31,5 +33,7 @@ interface IParserToolingV1 {
     /// Declared `view` so an implementation may read storage or an immutable to
     /// build its answer. A `pure` implementation still conforms, as an override
     /// may only tighten mutability.
+    /// @return Every two bytes is a function pointer for a literal parser,
+    /// dispatched on the first byte(s) of the literal.
     function buildLiteralParserFunctionPointers() external view returns (bytes memory);
 }

src/interface/ISubParserToolingV1.sol

@@ -17,5 +17,7 @@ interface ISubParserToolingV1 {
     /// Declared `view` so an implementation may read storage or an immutable to
     /// build its answer. A `pure` implementation still conforms, as an override
     /// may only tighten mutability.
+    /// @return Every two bytes is a function pointer for a sub parser word
+    /// parser, positionally indexed to match the parse meta.
     function buildSubParserWordParsers() external view returns (bytes memory);
 }