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

Annotations already declare readOnlyHint=false, idempotentHint=true, openWorldHint=true and destructiveHint=false. The description adds one useful piece of context beyond them - that creation also initiates tracking (a side effect) - but says nothing about failure modes, duplicate handling, or what is returned.

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?

A single front-loaded sentence with no waste. Minor deduction for the extraneous leading whitespace and for not using the second clause to add information not already implied.

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?

The operation is simple, both parameters are documented, and an output schema exists so return values need not be explained. Adequate, though the write-side effect (tracking starts immediately) could be spelled out more fully.

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%, with both url and timezone fully documented in the schema, so the baseline is 3. The description only restates that the URL identifies the account and adds no format or validation nuance beyond the schema example.

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?

States a specific verb+resource combination: add a competitor/tracked social account by profile URL. That clearly distinguishes it from the sibling list tools (social_competitors_list, social_competitor_posts_list), though it never names them.

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?

Usage is implied by 'add a competitor ... and start tracking it', but there is no explicit statement of when to choose this over social_competitors_list or what preconditions apply (e.g., whether the account must already exist, or what to do if it is already tracked).

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