set_string_table_entry

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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description's "upsert" wording overlaps with idempotentHint, and it never explains what gets overwritten when a key already exists or what permissions are required. It does add useful post-condition semantics via the return flags (created/updated/verified/saved), which is a modest but real addition.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Purpose is front-loaded in a single tight clause, followed by the return shape. The returns block is dense but each field is informative and it compensates for the absence of an output schema, so the size is justified.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema present, the description usefully enumerates the return payload (entry_set, created, updated, entry_count, saved, etc.), which an agent could not otherwise know. It is missing prerequisites and overwrite behavior, but overall it is complete enough for a 3-parameter upsert.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so key, source_string, and string_table_path are already fully documented in the schema. The description adds no syntax, format, or path-resolution detail beyond that, so the baseline of 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb+resource ("Set a Key to SourceString entry in a UStringTable") and clarifies the create-or-update semantics with "(upsert)". It clearly reads differently from siblings like remove_string_table_entry, get_string_table_entries, or set_string_table_metadata, though it doesn't name any of them explicitly to route the agent.

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

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

There is no when-to-use guidance, no prerequisites (e.g. whether the string table asset must already exist), and no mention of alternatives such as create_string_table. The only usable hint is the "(upsert)" parenthetical, which implies behavior but not context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.