Config Set

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While 'Set' implies a write/mutation operation, it doesn't specify whether this requires admin permissions, if changes are reversible, potential side effects (e.g., cache invalidation), or error handling. For a configuration mutation tool, this is a significant gap in transparency.

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?

The description is a single, efficient sentence that gets straight to the point with zero wasted words. It's appropriately sized for a straightforward configuration-setting tool and is perfectly front-loaded with the essential information.

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?

For a configuration mutation tool with no annotations and no output schema, the description is incomplete. It doesn't address what happens after setting values (e.g., cache implications, need for reindexing), doesn't explain the relationship with sibling tools, and provides no information about return values or error conditions.

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?

The input schema has 100% description coverage, clearly documenting all 5 parameters. The description adds no additional parameter semantics beyond what's already in the schema (e.g., it doesn't explain path format conventions, scope hierarchy, or value encoding). This meets the baseline expectation when schema coverage is complete.

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 clearly states the verb ('Set') and resource ('Magento 2 system configuration values'), making the purpose immediately understandable. However, it doesn't explicitly distinguish this tool from its sibling 'config-store-set', which appears to serve a similar configuration-setting function, leaving some ambiguity about when to use one versus the other.

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?

The description provides no guidance on when to use this tool versus alternatives like 'config-store-set' or other configuration-related tools in the sibling list. It lacks context about prerequisites, typical use cases, or any 'when-not-to-use' scenarios, leaving the agent to infer usage from the tool name alone.

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