Most "agent tool" products stop at routing: one API, one balance, no keys, and your agent can now call any tool. That's real value — but it's plumbing, and plumbing is a commodity.
The harder problem is know-how. Knowing that a competitor SEO audit means: pull their ranking keywords, scrape their top pages, check their backlink profile, then diff against yours — in that order, handling the failures in between. That orchestration is the actual work. Your agent shouldn't have to reinvent it every time.
Tools vs. skills
- Tools are single capabilities:
web.search,keyword.research,serp.rank. Metered per call. - Skills are packaged workflows built on top of tools: "Run a full SEO audit," "Draft a cold outbound sequence," "Find and score backlink opportunities." Installed once, they run end to end.
Routing is how your agent reaches a tool. A skill is how it knows what to do with a dozen of them.
Why the skill layer is the moat
Anyone can resell API access. What compounds is a library of skills that encode real operator knowledge — the kind a marketer or growth engineer would charge for. That's why SkillRune treats skills as the product and tool routing as the layer underneath.
Connect once, and your agent can call any tool from one balance — or install a skill that runs the whole workflow.