add_tags_to_db_instance

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

With no annotations, the description fails to disclose behavioral traits such as idempotency, error handling, permission requirements, or whether tags are appended or replaced. Only states basic action and return type.

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?

Description is very short but uses a docstring format (Args/Returns) that may not be optimal for AI consumption. Every sentence is functional but lacks structure for quick parsing.

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?

Given no output schema, no annotations, and 3 parameters with 0% schema coverage, the description is insufficient. It omits important details like error behavior, edge cases, and what the response contains beyond 'dict'.

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 coverage is 0%, but parameter descriptions in the docstring only restate names ('region ID', 'ID', 'tags to be added'). They add minimal semantic value beyond the schema. No explanation of the tags format (key-value) beyond what schema already shows.

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?

Description clearly states the action 'add tags' and the resource 'db instance', matching the tool name. However, it merely restates the name without further elaboration or distinguishing from sibling tools.

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?

No guidance on when to use this tool versus alternatives like modify_db_instance_spec or describe_db_instances. No prerequisites or context provided.

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