mysql_update_variables

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

With no annotations provided, the description carries the full behavioral burden, yet it discloses nothing: not what kinds of variables can be set, whether changes persist across restarts, whether they take effect immediately, or what happens on invalid values. This is a mutation tool with zero behavioral context.

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?

It is short, but the brevity reflects under-specification rather than conciseness. There is no front-loaded purpose statement or actionable detail to justify the sentence.

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 mutation tool with no annotations, no output schema, and an opaque nested-object parameter, the description omits everything an agent needs. It is completely inadequate given the tool's complexity.

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 single required parameter 'variables' is a nested object with 0% schema description coverage and no shape documented anywhere. The description does not name a single key, format, or example, so an agent cannot construct a valid call.

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 'MySQL: Update variables' is essentially a restatement of the tool name, with no differentiation from the sibling mysql_get_variables beyond the verb. It conveys only the vaguest notion of a write against MySQL configuration.

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 indication of when to use this tool versus mysql_get_variables or mysql_update_remote_access, no prerequisites, and no note about required permissions or whether a restart is needed. The agent is left to infer everything.

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