Problem

src/tools/utils.ts (~440 lines) is a grab-bag of two unrelated concerns kept top-level by #978 (which explicitly left the split out of scope):

1. Tool-name helpers — actorNameToToolName, legacyToolNameToNew, getToolSchemaID, isActorInfoMcpServer, isActorBlockedUnderPaymentProvider.
2. Actor input-schema transformation (the bulk) — buildActorInputSchema, transformActorInputSchemaProperties, filterSchemaProperties, markInputPropertiesAsRequired, shortenProperties, pruneSchemaPropertiesByWhitelist, encode/decodeDotPropertyNames, the AJV/enum helpers, etc.

The filename says nothing about either, so consumers import a vague tools/utils.js for very different things.

Proposed solution

Split into two intention-revealing modules (names TBD, e.g. tools/tool_naming.ts and tools/actor_input_schema.ts), update imports, keep behavior identical. Pure structural move like #978.

Coordinate with #954 (Actor input-schema transformation alignment), which touches the same schema-transformation code.

Notes

Deferred from #978; part of the #979 cleanup. Confirm no impact on apify-mcp-server-internal before landing.