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remove_string_table_metadata

DestructiveIdempotent

Remove a metadata ID from a UStringTable entry in Unreal Engine. Safe to call if the ID is absent; pairs with metadata set/get tools.

Instructions

Remove a metadata id from a UStringTable entry (FStringTable::RemoveMetaData). Idempotent (no-op if the id is absent). Pairs with set/get_string_table_metadata.

Returns: { string_table_path: string, key: string, metadata_id: string, existed: bool, removed: bool, still_exists: bool, entry_exists: bool, metadata: object, metadata_count: int, namespace: string, saved: bool }

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
keyYesEntry key the metadata is attached to.
metadata_idYesMetadata id (an FName, e.g. 'Comment') to remove.
string_table_pathYesFull asset path to the UStringTable.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.1.0

TDQS

A4.1/5.0
Behavior4/5

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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered; the description usefully adds the no-op-on-absent semantics and a full return payload (existed, removed, still_exists, saved) that tells the agent how to interpret the outcome. The idempotency statement partly restates the annotation, keeping it from a 5.

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?

Front-loaded with the action, then idempotency, then relationship, then return shape. Three tight sentences with little waste, though the inline return-object dump is somewhat verbose.

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?

No output schema exists, but the description compensates by enumerating the return fields (existed, removed, still_exists, entry_exists, saved), which is exactly what the agent needs to interpret a destructive removal. The only minor gap is lack of explicit auth/prerequisite notes.

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 description coverage is 100%, so the three parameters are fully documented in the schema. The description merely echoes string_table_path, key, and metadata_id in the return shape and adds no syntax or format detail beyond the schema; baseline 3 is appropriate.

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?

States a precise verb+resource ('Remove a metadata id from a UStringTable entry'), even naming the underlying engine function, and distinguishes itself from the set/get metadata siblings by being the removal operation. An agent can identify it without opening the schema.

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

Usage Guidelines4/5

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

The 'Pairs with set/get_string_table_metadata' note gives clear workflow context for this part of the metadata suite, and 'Idempotent (no-op if the id is absent)' clarifies reuse behavior. It stops short of explicit when-not/alternative routing, so not a 5.

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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