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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds only that connectivity is conditional ('currently available'), giving a hint that results may vary by account state. It says nothing about authentication requirements or whether the list can be empty.

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?

Two short sentences, front-loaded with the purpose before the chaining instruction. Every sentence earns its place with no filler.

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 an output schema present, the description need not document return fields, and with no parameters and full annotation coverage the remaining burden is light. It correctly points at the downstream use of the returned IDs, though it omits any note on empty results or account prerequisites for a tool with openWorldHint=true.

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 tool takes zero parameters, so there are no parameter semantics to explain and the rubric's baseline of 4 applies. The description appropriately avoids redundant parameter talk.

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 states a specific verb and resource ('Lists all social media networks') and narrows scope to those 'currently available for connecting to Blog2Social'. The availability/connectivity framing distinguishes it from the sibling networks.list_properties, which enumerates attributes rather than connectable networks.

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?

It gives clear workflow context: the returned network_id must be paired with network_type_id when calling connections.add. That tells the agent where this tool sits in a sequence, but it never names when NOT to use it or how to choose between it and connections.list / networks.list_properties.

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