Runs multiple execution threads.

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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=false, so the mutation/non-idempotent profile is covered structurally. The description adds only the bulk scope and workspace targeting; it does not say whether created threads begin running immediately, whether there is a creation cap, or whether partial failure is possible.

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 efficient sentence with the bulk scope front-loaded. Minor padding in the opener 'This method can be used to', which could be trimmed to 'Starts execution threads in bulk...'.

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 two-parameter tool with no output schema and full schema coverage, the essentials are present. Still missing: what is returned (thread objects? IDs?), the effect of omitting count (declared required in the schema text but absent from the required list), and any limit on how many threads can be created at once.

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%, so both parameters (count, workspaceId) are already documented, including the -1 default-workspace convention. The description's 'for the specified workspace' adds no information beyond the schema, so the baseline of 3 applies.

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 and resource ('start execution threads in bulk') and scopes it to 'the specified workspace', which distinguishes it from the singular create_thread and other bulk thread tools. However, the verb 'start' differs from the name's 'create', leaving slight ambiguity about whether threads are merely created or immediately launched.

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 prefer this over create_thread for a single thread, nor any prerequisites (e.g., a valid workspace, existing profiles). The sibling create_thread and bulk_continue_use_thread are never referenced, so the agent must infer the choice from names alone.

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